{
  "id": "attack-on-pearl-harbor",
  "title": "Attack on Pearl Harbor",
  "lang": "en",
  "source_lang": "en",
  "summary": "The Japanese surprise attack on Hawaii on December 7, 1941, that brought the United States into World War II.",
  "category": "history",
  "subcategory": "",
  "type": "event",
  "aliases": [
    "Pearl Harbor attack",
    "Pearl Harbour attack",
    "Attack on Pearl Harbour"
  ],
  "generated_at": "2026-10-13",
  "model": "pro/gpt-6.1-sol",
  "url": "https://aiwiki.page/en/attack-on-pearl-harbor/",
  "translations": {
    "zh-Hans": {
      "url": "https://aiwiki.page/zh/attack-on-pearl-harbor/",
      "json": "https://aiwiki.page/zh/attack-on-pearl-harbor.json"
    }
  },
  "sections": [
    {
      "heading": "",
      "text": "The attack on Pearl Harbor was a surprise military assault by the Imperial Japanese Navy against the United States Pacific Fleet and military installations on the Hawaiian island of Oʻahu on December 7, 1941. Aircraft operating from six Japanese carriers struck in two waves, attacking warships in Pearl Harbor and nearby airfields; submarines also participated in the operation. The attack killed 2,403 American military personnel and civilians, wounded 1,178, and destroyed 188 American military aircraft. (history.navy.mil)\n\nThe operation followed deteriorating relations between Japan and the United States over Japanese expansion in China and Southeast Asia, economic sanctions, and unsuccessful diplomatic negotiations. Japanese planners sought to disable the Pacific Fleet while Japan undertook offensives farther west and south. Although the attack inflicted extensive damage, American aircraft carriers were absent, and important fuel-storage, repair, and submarine facilities survived. The United States declared war on Japan on December 8; declarations involving Germany and Italy followed on December 11, bringing the country formally into both major theaters of World War II. (history.state.gov)\n\nPearl Harbor’s history encompasses the diplomatic road to war, Japanese operational planning, American preparedness, the attacks across Oʻahu, and the subsequent rescue and salvage effort. Its aftermath also includes wartime restrictions on civilians, official investigations into the failure to anticipate the assault, and the preservation of wrecks and memorials as places of remembrance. (nps.gov)"
    },
    {
      "heading": "Japanese–American Relations and the Road to War",
      "text": "The Second Sino-Japanese War, which began in July 1937, widened the conflict between Japanese expansion and American support for Chinese sovereignty and equal commercial access in East Asia. As Japanese forces occupied Chinese territory, the United States protested and increasingly assisted the government of Chiang Kai-shek, while initially avoiding direct military confrontation. Japanese entry into northern French Indochina in September 1940 extended the conflict beyond China and threatened supply routes serving Chinese resistance. The deployment into southern Indochina in July 1941 placed Japanese forces closer to British Malaya, the Netherlands East Indies, and the American-controlled Philippines, making further expansion into Southeast Asia a more immediate concern for Washington. (history.state.gov)\n\nAmerican economic restrictions developed in stages rather than beginning with a comprehensive oil embargo. In July 1940, Washington placed petroleum products and iron and steel scrap under export licensing; aviation gasoline shipments were stopped, but other petroleum exports initially continued under license. Restrictions announced on September 26 effectively excluded Japan from scrap exports beginning October 16, when licenses were limited to Britain and countries in the Western Hemisphere. On July 26, 1941, President Franklin D. Roosevelt froze Japanese assets in the United States. This brought financial transactions and trade involving Japanese interests under government control: purchases required both export authorization and permission to use funds. The subsequent administration of these controls, together with tighter petroleum restrictions, interrupted American oil supplies; British and Dutch economic measures further constrained Japan’s access to imports. The asset freeze was therefore distinct from, although instrumental in producing, the effective oil embargo. (history.state.gov)\n\nNegotiations continued alongside these measures. Secretary of State Cordell Hull dealt with Japanese ambassador Kichisaburō Nomura, joined in November by special envoy Saburō Kurusu. The central disagreement concerned whether economic relations could be restored while Japan retained its military position in China. On November 20, Japan presented a provisional proposal offering to transfer its forces from southern to northern Indochina, with eventual withdrawal from Indochina after peace in China or the Pacific. In return, it sought renewed petroleum supplies, restoration of commercial relations, and American restraint from measures obstructing Japan’s attempted settlement in China. Washington considered a temporary arrangement that would permit limited civilian trade in exchange for Japanese military concessions in Indochina, but did not submit that arrangement as its final response. (history.state.gov)\n\nOn November 26, 1941, Hull handed Nomura and Kurusu the Hull note, an outline for a comprehensive Pacific settlement. It proposed withdrawal of Japanese military, naval, air, and police forces from China and Indochina, and stipulated that neither country support any Chinese government other than the National Government at Chongqing. Other provisions included a multilateral nonaggression pact, negotiations for a trade agreement, and reciprocal removal of asset-freezing restrictions. The document was a tentative negotiating proposal, not a declaration of war, and contained no deadline for acceptance. Japanese leaders nevertheless treated it as incompatible with their position in China and as a de facto ultimatum. (teachingamericanhistory.org)\n\nEconomic pressure narrowed Japan’s options, but the decision to initiate war followed separate political and military deliberations. Under Prime Minister Hideki Tōjō, an imperial conference on November 5 authorized continued negotiations and simultaneous preparations for hostilities in early December if no settlement emerged; the final decision for war came on December 1. The planned southern offensives sought resource-producing territories, particularly the petroleum-rich Netherlands East Indies, while attacking British and American positions that could obstruct their conquest. Pearl Harbor’s role was to disable the American Pacific Fleet at the outset and prevent naval intervention during these operations. It was thus part of a wider offensive strategy, not an isolated attempt to reverse American trade restrictions. (mofa.go.jp)"
    },
    {
      "heading": "Japanese Planning, Forces, and Attack Technology",
      "text": "Admiral Isoroku Yamamoto, commander-in-chief of Japan’s Combined Fleet, sponsored the Pearl Harbor operation as an opening blow intended to prevent American naval interference with Japan’s southern offensives. In early 1941, Commander Minoru Genda examined its feasibility and helped develop the operational plan, emphasizing concentrated carrier air power and surprise. The proposal encountered opposition within the Naval General Staff, which needed carriers for operations nearer Southeast Asia; staff studies and war games preceded its acceptance in autumn 1941. Vice Admiral Chūichi Nagumo commanded the carrier striking force, while Commander Mitsuo Fuchida directed the airborne assault and personally led its first wave. These responsibilities distinguished Yamamoto’s strategic sponsorship, Genda’s planning work, Nagumo’s command at sea, and Fuchida’s tactical leadership in the air. (usni.org)\n\nThe striking force, commonly called Kidō Butai, concentrated six aircraft carriers: Akagi, Nagumo’s flagship, and Kaga of Carrier Division 1; Sōryū and Hiryū of Division 2; and Shōkaku and Zuikaku of Division 5. Its supporting warships included the fast battleships Hiei and Kirishima, heavy cruisers Tone and Chikuma, light cruiser Abukuma, and nine destroyers. Three fleet submarines patrolled shipping lanes in support of the force, and two supply groups comprising eight tankers provided the fuel required for the trans-Pacific passage. A separate Advance Expeditionary Force deployed large submarines around Hawaii to reconnoiter and attack American ships escaping to sea; five carried two-man midget submarines intended to penetrate the harbor. The submarine deployment therefore supplemented, rather than replaced, the carrier attack. (ibiblio.org)\n\nThree aircraft types supplied complementary capabilities. Mitsubishi A6M2 Zero fighters escorted the bombers, sought to suppress airborne opposition, and strafed aircraft on the ground. Nakajima B5N2 carrier attack aircraft served either as low-flying torpedo bombers or as horizontal bombers carrying heavy armor-piercing bombs. Aichi D3A1 dive bombers attacked airfields and ships, using steep approaches to deliver their bombs accurately. The planned combination addressed different vulnerabilities: torpedoes struck below a ship’s waterline, heavy bombs threatened armored decks, and attacks on aviation facilities reduced the prospect of interception. Horizontal bombing was particularly important against battleships moored in pairs, because the inboard vessel was screened from torpedo attack by the outboard ship. (home.nps.gov)\n\nPearl Harbor’s average depth of approximately 45 feet—14 metres—required changes to aerial torpedoes, which otherwise plunged too deeply after release. Japanese technicians fitted wooden stabilizing attachments and modified the weapons’ arming arrangements; pilots also practiced controlled low-altitude releases to limit their initial dive. Training in Kagoshima Bay, whose confined waters offered useful similarities to the target, established suitable approach courses, speeds, and release altitudes. For horizontal bombing, approximately 800-kilogram armor-piercing weapons were manufactured from naval shells, with aircraft release equipment altered to accommodate them. Their purpose was to penetrate armored decks before detonating, giving aircraft another means of attacking heavily protected ships. (home.nps.gov)\n\nSecrecy and logistics shaped the approach. Ships assembled at isolated Hitokappu Bay on Etorofu in the Kuril Islands and departed on November 26, 1941, Japanese time. The route crossed the northern Pacific, away from normal commercial shipping lanes, before turning southeast toward Hawaii. Radio silence reduced the risk of detection by communications interception, while tanker replenishment extended the carriers’ and destroyers’ operating range. Nagumo’s instructions allowed cancellation if negotiations succeeded and required withdrawal under specified conditions of premature discovery. On December 2, the final order confirmed December 8 in Japan—December 7 in Hawaii—as the date for opening hostilities. The passage brought the carriers undetected to their launching area north of Oʻahu. (usni.org)"
    },
    {
      "heading": "Pearl Harbor and American Defensive Readiness",
      "text": "Pearl Harbor, on the southern coast of Oʻahu in the Territory of Hawaii, became the principal operating base of the United States Pacific Fleet after the fleet remained in Hawaiian waters following exercises in 1940. Its sheltered anchorage combined fleet berths with aviation, supply, and repair facilities. Ford Island contained a naval air station; along its southeastern shore, Battleship Row provided moorings for the battle line. Across the channel, the navy yard’s workshops and dry docks supported maintenance and overhaul. Access from the ocean passed through a guarded entrance channel, where submarine nets and patrol vessels provided defenses against underwater intrusion rather than aircraft. (history.navy.mil)\n\nAdmiral Husband E. Kimmel commanded the Pacific Fleet, while Lieutenant General Walter C. Short commanded the Army’s Hawaiian Department. Their responsibilities overlapped without placing all island defenses under a single commander: the Navy undertook distant aerial reconnaissance, while the Army provided land-based fighter defense, antiaircraft artillery, and aircraft warning. Joint plans existed, but their implementation depended on exchanges between separate headquarters. Short assumed that naval reconnaissance would provide warning of an approaching force; Kimmel assumed a higher Army alert than the antisabotage posture actually adopted. Coordination therefore required not merely agreement on responsibilities, but accurate knowledge of the other service’s operating arrangements. (history.navy.mil)\n\nEight battleships were in the harbor on December 7, 1941. Arizona, California, Maryland, Nevada, Oklahoma, Tennessee, and West Virginia occupied Battleship Row; Pennsylvania was in Dry Dock No. 1 at the navy yard. None of the Pacific Fleet’s three aircraft carriers was present. Enterprise was returning after delivering Marine fighters to Wake Island, while Lexington was at sea carrying Marine aircraft to Midway. Saratoga was on the mainland, reaching San Diego on December 7 after an overhaul at the Puget Sound Navy Yard. Their absence reflected separate deployment and maintenance schedules, not a common assignment taking all three away from Hawaii. (history.navy.mil)\n\nReconnaissance requirements exceeded the aircraft and trained crews available for sustained coverage. A joint estimate prepared by Rear Admiral Patrick N. L. Bellinger and Major General Frederick L. Martin on March 31, 1941, explicitly recognized that available aircraft could not maintain patrols extensive enough to guarantee detection of a carrier attack. Naval calculations placed the requirement for one complete 360-degree search to 800 miles at 84 aircraft flying sixteen-hour missions; sustained operations with reliefs would require at least 180 reconnaissance aircraft. Training flights and limited patrols did not constitute a continuous ocean-search screen. The equipment shortage was thus significant, but distinct from decisions about which sectors to search and when. (history.navy.mil)\n\nAfter receiving Washington’s November 27 warning, Short ordered Alert No. 1, an antisabotage condition defined in the Hawaiian Department’s November 5 standing operating procedure. Army aircraft were concentrated in closely parked groups, facilitating surveillance by guards but leaving them vulnerable to bombing and strafing. Most Army antiaircraft ammunition remained boxed and stored away from gun positions. Naval readiness differed: fleet orders required a quarter of shipboard antiaircraft batteries to remain ready, with crews nearby and ammunition in ready-service boxes. A quarter of the fleet’s .50-caliber antiaircraft guns were manned, although the heavier guns were not all immediately in action when the attack began. (history.army.mil)\n\nThe Army’s developing radar warning network linked mobile stations to an information center near Fort Shafter, where reports could be plotted and used to direct fighter interception. By early December, it had demonstrated its ability to detect aircraft, but it was still operating substantially as a training organization. Scheduled radar operation was limited to 4:00–7:00 a.m., Hawaiian local time. Procedures for reporting friendly aircraft movements, staffing controller positions, and maintaining naval liaison remained incomplete. These deficiencies limited the system’s ability to convert a radar contact into an identified threat and a coordinated defensive response. (ibiblio.org)"
    },
    {
      "heading": "The Approach and Unheeded Warnings",
      "text": "By dawn on December 7, 1941, Vice Admiral Chūichi Nagumo’s six-carrier striking force had reached its launching position, slightly more than 200 miles north of Oʻahu, without being detected by American forces. All times here are Hawaiian local time. At approximately 6:10 a.m., the carriers began launching the first attack wave: more than 180 fighters, torpedo bombers, level bombers, and dive bombers. The aircraft assembled and headed south toward Oʻahu while the ships prepared the second wave. American personnel subsequently detected both a submarine near the harbor entrance and the approaching aircraft, but neither report produced a general warning before the air attack. (nps.gov)\n\nThe submarine operation had begun before the aircraft launch. Five Japanese fleet submarines—I-16, I-18, I-20, I-22, and I-24—each carried a Type A midget submarine, which they released during the hours before dawn. Each small craft carried two torpedoes; its mission was to enter Pearl Harbor covertly and attack American warships during the air raid, then escape to rendezvous with its parent submarine. At approximately 3:50 a.m., the minesweeper Condor reported a periscope near the harbor entrance to the patrolling destroyer USS *Ward*. Ward searched without finding the contact. At about 6:37 a.m., however, it sighted a submarine apparently following the auxiliary ship Antares toward the entrance. Lieutenant William W. Outerbridge ordered an attack, and Ward fired its guns and dropped depth charges, sinking the submarine at approximately 6:45–6:47 a.m. (npgallery.nps.gov)\n\nThe submarine report moved through several naval command channels rather than immediately becoming a fleet-wide alarm. Ward reported that it had attacked a submarine in the defensive sea area; a patrol aircraft also reported action against a submarine near the entrance. By about 7:12 a.m., Rear Admiral Claude Bloch, commandant of the Fourteenth Naval District, had been informed. Officers considered the possibility of another false submarine report, although preparations to dispatch the duty destroyer continued. Admiral Husband E. Kimmel received notification before the raid, but accounts differ over the exact time and sequence of telephone calls. At 7:51 a.m., USS Monaghan was ordered to proceed immediately and contact Ward. Thus, the report did prompt a local response, but the possibility of a submarine intrusion was not translated into an island-wide warning of an imminent carrier air attack. (history.navy.mil)\n\nMeanwhile, at 7:02 a.m., Privates Joseph Lockard and George Elliott detected an exceptionally large return on the SCR-270 radar at Opana, near Oʻahu’s northern tip, approximately 130 miles to the north. The station had remained operating beyond the scheduled 7:00 a.m. shutdown. Elliott telephoned the Army information center at Fort Shafter shortly afterward; Lockard subsequently discussed the contact with Lieutenant Kermit Tyler. The center was only minimally staffed, and Tyler was newly assigned to the observer’s role. He interpreted the approaching formation as B-17 bombers expected from the American mainland that morning and advised the operators not to worry. No interception or general air-raid warning followed. Lockard and Elliott continued tracking the aircraft until approximately 7:40 a.m., when interference from the surrounding terrain obscured the return. (nps.gov)\n\nThe information available at the time differed from the reconstruction possible afterward. Opana’s operators had detected a large approaching aircraft formation, not identified Japanese aircraft; Tyler’s explanation relied on an expected friendly arrival. Naval officers had reports of a submarine engagement, not knowledge of the carrier force north of Oʻahu. The naval and Army reports remained in separate reporting chains and were not combined into a common warning before the strikes shortly before 8:00 a.m. The radar detection therefore provided more than fifty minutes’ notice of approaching aircraft, but not an effective warning to the fleet or airfields. (nps.gov)"
    },
    {
      "heading": "The Two Air-Attack Waves",
      "text": "The opening air strikes on December 7, 1941, began shortly before 8:00 a.m.; all times here are Hawaiian local time. Attacks on installations elsewhere on Oʻahu were not merely follow-up operations to the assault on the harbor. Japanese aircraft struck Wheeler Army Airfield at approximately 7:50, while the main attack on the anchored fleet began around 7:55. Bombing and strafing of aviation facilities, including Kaneohe, Ewa, Hickam, and Ford Island, accompanied the attacks on ships. Their purpose was to destroy American aircraft on the ground and prevent interception while the ship-striking groups attacked the fleet. (nps.gov)\n\nCommander Mitsuo Fuchida directed the first wave, whose assigned strength comprised 40 torpedo bombers, 49 level bombers, 51 dive bombers, and 43 fighters. These groups performed complementary tasks: torpedo aircraft approached low over the water to strike ships below their armor belts; level bombers dropped heavy armor-piercing bombs against battleships; dive bombers attacked aviation installations; and fighters provided cover and strafed grounded aircraft. The Nakajima B5N served both as a torpedo aircraft and as a level bomber, depending on its armament. Seven battleships lay along Ford Island’s southeastern shore, while Pennsylvania occupied a navy-yard drydock. Their stationary positions allowed attackers to make repeated approaches against concentrated targets. (nps.gov)\n\nThe most destructive shipboard explosion occurred aboard USS Arizona at approximately 8:10 a.m., when an armor-piercing bomb ignited the forward ammunition magazine. The explosion devastated the ship’s forward section and started extensive fires. Oklahoma, moored outboard of Maryland, suffered repeated torpedo hits on her exposed port side and capsized within minutes. West Virginia, alongside Tennessee, also sustained multiple torpedo hits and settled on the harbor bottom; counterflooding of starboard compartments checked her list and prevented capsizing. The inboard battleships Maryland and Tennessee suffered bomb damage, while California and USS Nevada sustained torpedo damage. These different outcomes reflected both the weapons striking each ship and the effects of flooding, fire, and ammunition explosions. (history.navy.mil)\n\nThe second wave began its principal attacks at approximately 8:50 a.m., following a brief lull. Unlike the first wave, it carried no aerial torpedoes: level bombers, dive bombers, and fighters renewed attacks against ships and aviation facilities, now encountering substantially more antiaircraft fire. The navy-yard drydocks became important targets. Pennsylvania received a direct bomb hit, while the destroyers Cassin and Downes, positioned ahead of her in the same dock, were struck and engulfed by fires; Cassin subsequently toppled against Downes. Bombs also set Shaw ablaze in the floating drydock YFD-2, leading to an explosion of her forward magazine. (home.nps.gov)\n\nNevada provided the raid’s principal example of a battleship attempting to get underway. Despite a first-wave torpedo hit, she left her berth at approximately 8:40 a.m. and proceeded down the harbor under the direction of Lieutenant Commander Francis J. Thomas, the senior officer aboard. Her movement attracted second-wave dive bombers, whose additional hits caused fires and worsening flooding. Rather than risk sinking in the navigational channel, she was deliberately grounded near Hospital Point at about 9:10. The second-wave attacks continued into the morning, ending at approximately 9:45; the surviving Japanese aircraft then withdrew toward their carriers. (history.navy.mil)"
    },
    {
      "heading": "Fighting and Rescue Across Oʻahu",
      "text": "Japanese attacks on aviation installations across Oʻahu sought to destroy aircraft on the ground and prevent American fighters from interfering with the assault on the fleet. Hickam Field, adjoining the Pearl Harbor naval yard, housed Army bombers; Wheeler Field, beside Schofield Barracks in central Oʻahu, was the principal fighter concentration. Ewa Marine Corps Air Station lay about seven miles west of Pearl Harbor, while Bellows Field at Waimānalo and Kaneohe Naval Air Station on Kāneʻohe Bay covered the windward side of the island. Bombing and strafing struck aircraft, hangars, workshops, and accommodation buildings. At Wheeler, 25 first-wave dive-bombers dropped approximately 35 bombs before strafing the flight line. At Kaneohe, repeated attacks devastated the parked PBY patrol aircraft and subsequently struck the hangars. (history.navy.mil)\n\nA small number of American pilots nevertheless reached serviceable fighters. Second Lieutenants George Welch and Kenneth Taylor, of the 47th Pursuit Squadron, drove from Wheeler to the auxiliary strip at Haleʻiwa after arranging for their P-40s to be armed. They were airborne by approximately 8:15 a.m., Hawaiian local time, and engaged Japanese aircraft near Ewa and Barbers Point. Both returned to Wheeler for ammunition and fuel, then took off again as another Japanese attack developed. Welch was credited with four victories and Taylor with two confirmed victories in the initial accounting. Other pilots also fought: four P-36s from the 46th Pursuit Squadron left Wheeler at about 8:50 a.m. and engaged Japanese aircraft over southeastern Oʻahu. At Bellows, however, Japanese strafing killed Lieutenant Hans Christensen as he approached his fighter; George Whiteman was shot down just after takeoff, while Samuel Bishop survived being shot down into the sea. (aviation.hawaii.gov)\n\nShipboard resistance developed rapidly despite the surprise. The Pacific Fleet’s subsequent report estimated that practically all battleship antiaircraft batteries were firing within an average of less than five minutes; cruisers averaged about four minutes, and destroyers about seven minutes to bring all their antiaircraft guns into action. These were retrospective estimates rather than synchronized timings for every ship. Shore personnel also improvised defenses. At Ewa, Marines initially fired rifles and pistols, then brought spare machine guns into action; ground crews used rear-cockpit guns in damaged scout bombers. Identification remained hazardous: American fighters returning over Pearl Harbor encountered fire from their own defenses, illustrating the difficulty of distinguishing friendly aircraft amid smoke and continuing alarms. (history.navy.mil)\n\nAboard West Virginia, Mess Attendant Second Class Doris Miller assisted in moving Captain Mervyn Bennion, who had been mortally wounded, to a more sheltered position. Miller subsequently operated an antiaircraft machine gun against attacking aircraft until ordered to leave the bridge. His Navy Cross citation specifically recognized both the assistance to his captain and his gunfire under attack; it did not establish a number of aircraft destroyed. Admiral Chester W. Nimitz presented the decoration aboard Enterprise at Pearl Harbor on May 27, 1942. (history.navy.mil)\n\nOn the opposite side of Ford Island, the torpedoed training ship Utah began to capsize. Chief Watertender Peter Tomich remained in the engineering spaces to secure the boilers and ensure that fireroom personnel had evacuated. He died aboard the ship and received the Medal of Honor posthumously. His actions addressed the immediate danger posed by operating machinery during a rapid capsize, while allowing other engineering personnel to escape. (history.navy.mil)\n\nCivilian exposure extended beyond the military installations. The National Park Service identifies Japanese attacks on sugar mills at Waipahu and near Ewa, killing one and two civilians respectively; civilian aircraft were also fired upon. A separate source of destruction was American antiaircraft ammunition that failed to burst aloft and exploded on reaching populated areas around Pearl Harbor and Honolulu. These explosions damaged buildings and started fires while firefighters were already responding at military installations. Three Honolulu firefighters—John Carriera, Thomas Macy, and Harry Tuck Lee Pang—were killed while responding at Hickam Field. The civilian record therefore includes direct Japanese fire, American defensive ammunition, and deaths among civilian workers and emergency responders at military targets, rather than a single uniform cause. (nps.gov)"
    },
    {
      "heading": "Casualties, Material Damage, and Operational Limits",
      "text": "The standard American casualty totals for December 7, 1941, are 2,403 killed and 1,178 wounded. The dead comprised 2,335 military personnel—2,008 Navy personnel, 109 Marines, and 218 Army personnel—and 68 civilians. Military wounded numbered 1,143: 710 Navy personnel, 69 Marines, and 364 Army personnel; another 35 wounded were civilians. These figures encompass the attacks across Oʻahu, not merely the ships inside Pearl Harbor. USS Arizona alone lost 1,177 sailors and Marines when a bomb detonated its forward ammunition magazines, accounting for almost half of all American deaths. The concentration of fatalities aboard that battleship made the human losses substantially more uneven than the distribution of physical damage among ships and installations. (history.navy.mil)\n\nAmerican aircraft losses totaled 188 destroyed and 159 damaged, predominantly aircraft struck on the ground before they could take off. The Naval History and Heritage Command’s detailed inventory lists 21 ships or naval units sunk or damaged: eight battleships; the light cruisers Helena, Honolulu, and Raleigh; the destroyers Cassin, Downes, Helm, and Shaw; the seaplane tender Curtiss; the target and training ship Utah; the repair ship Vestal; the minelayer Oglala; the harbor tug Sotoyomo; and Floating Drydock Number 2. Thus, the frequently quoted “21 ships” includes a floating drydock as well as commissioned combatants and auxiliary vessels. Narrower counts emphasizing ships sunk or seriously damaged omit some units with lesser damage or use different categories for auxiliary craft. (history.navy.mil)\n\n“Sunk,” “grounded,” and “permanently lost” describe different outcomes. Arizona was wrecked, Oklahoma capsized, and West Virginia and California settled on the harbor bottom; Nevada was deliberately grounded after suffering torpedo and bomb damage. Utah capsized, while Oglala and Sotoyomo also sank. Shallow water made recovery possible for several vessels that were initially recorded as sunk. Only Arizona, Oklahoma, and Utah never returned to operational service. The destroyers Cassin and Downes illustrate another accounting distinction: their damaged hulls were not restored, but surviving machinery and equipment were incorporated into new hulls under the same names and hull numbers. Consequently, an immediate damage assessment cannot be read as an inventory of permanent fleet losses. (aviation.hawaii.gov)\n\nJapanese losses in the immediate attack are conventionally counted as 29 aircraft and 55 airmen, together with all five two-man midget submarines. Nine submariners died; the tenth, Ensign Kazuo Sakamaki, survived and was captured on December 8 after his submarine, HA-19, stranded near Bellows Field. On this convention, Japanese deaths totaled 64, with one prisoner. “Five submarines lost” therefore means five boats failed to return, not that all five sank during combat: Sakamaki’s craft was captured. Broader operational accounts also include the fleet submarine I-70, sunk on December 10, but that later loss is separate from the December 7 attack totals. (home.nps.gov)\n\nThe raid inflicted extensive damage on the battle line without eliminating Pearl Harbor’s supporting infrastructure. Fuel-storage tanks, the submarine base, and the principal shipyard repair facilities survived, preserving the logistical capacity to fuel vessels, maintain submarines, and undertake salvage and repairs. The American aircraft carriers were absent and escaped damage. Vice Admiral Chūichi Nagumo withdrew his carrier force after recovering the two attack waves; no third strike was launched. Fuel constraints and uncertainty about the location of American carriers formed part of the operational setting of that decision. Later proposals involving attacks on oil storage or repair facilities describe alternatives, not additional phases of the operation, and their hypothetical effects should not be counted among the raid’s established results. (history.navy.mil)"
    },
    {
      "heading": "Salvage and Restoration of the Fleet",
      "text": "A formal salvage organization was established one week after the attack, and Captain Homer N. Wallin took command of its Salvage Division in early January 1942. Its personnel worked alongside the Pearl Harbor Navy Yard, ships’ crews, naval divers, and civilian contractors, notably the Pacific Bridge Company. Underwater surveys established the condition of hulls and compartments; divers closed openings, installed patches, and prepared flooded spaces for pumping. Refloating was followed by removal of oil, mud, ammunition, and human remains, then restoration of machinery and electrical equipment. Across the salvage program, naval and civilian divers made approximately 5,000 dives, totaling about 20,000 hours underwater. Work inside the wrecks required ventilation and precautions against toxic gases. (history.navy.mil)\n\nUSS Nevada, deliberately grounded during the attack, became the first major battleship recovery. Salvors had to restore internal watertight boundaries and address numerous hull openings before pumping could overcome incoming water. A large external patch intended to cover the torpedo hole proved ineffective because the surrounding hull was distorted. Nevertheless, Nevada was refloated on February 12, 1942, and entered Drydock Number Two on February 18. Her recovery required more than 400 dives and over 1,500 hours of underwater work. Two men died from hydrogen sulfide exposure on February 7, prompting stricter gas-safety measures for subsequent operations. Temporary repairs enabled the ship to depart for the West Coast in April. (history.navy.mil)\n\nUSS California required a different approach because much of her upper deck was submerged. Wooden cofferdams built around the deck edges extended the hull above the waterline, allowing pumps to dewater the interior without water continually flowing over the sides. Salvors removed the mainmast, nine of twelve 14-inch guns, ammunition, and other weights. Divers closed internal openings, making extensive external patches over the torpedo holes unnecessary. California floated again on March 24, 1942, and entered drydock on April 9. USS West Virginia, by contrast, needed substantial external patches over extensive torpedo damage before pumping could succeed. She was refloated on May 17 and drydocked on June 9, 1942. Both ships’ turbo-electric propulsion systems required drying, preservation, disassembly, and reconditioning before they could proceed to mainland yards. (history.navy.mil)\n\nThe capsized USS Oklahoma first had to be rotated upright. Salvors installed righting frames on the exposed hull and connected them by cables to twenty-one shore-mounted winches on Ford Island. Weight removal and coral fill beside the bow helped the hull roll rather than slide. Pulling began on March 8, 1943, and continued, with repeated cable adjustments, until mid-June. Patching and pumping then brought the ship afloat on November 3, 1943. The operation principally recovered an important mooring berth and usable equipment, rather than preparing the battleship for combat. Oklahoma never returned to operational service; sold for scrapping in 1946, she sank under tow in May 1947. Neither Arizona nor the target ship Utah returned to service: equipment was recovered from Arizona, while efforts only partially righted Utah. Their hulls remained at Pearl Harbor. (history.navy.mil)\n\nRecovery and modernization extended well beyond refloating. Nevada received permanent repairs and an enlarged antiaircraft battery, returning to combat at Attu in May 1943 and supporting the Normandy landings in June 1944. California underwent major reconstruction at Puget Sound and rejoined the combat fleet in early 1944; West Virginia emerged from that yard in July with a widened hull and greatly strengthened antiaircraft armament. At the Battle of Surigao Strait on October 24–25, 1944, five Pearl Harbor veterans—West Virginia, California, Tennessee, Maryland, and Pennsylvania—served in Rear Admiral Jesse B. Oldendorf’s six-battleship line. West Virginia opened fire at 3:53 a.m. on October 25, employing radar fire control against the approaching Japanese force. (history.navy.mil)"
    },
    {
      "heading": "Declarations of War and the Wider Pacific Offensive",
      "text": "Japan’s final diplomatic memorandum was delivered after the attack had begun, but it was not itself a declaration of war. Tokyo instructed Ambassador Kichisaburō Nomura to present it to Secretary of State Cordell Hull at 1:00 p.m. Washington time on December 7, 1941. Nomura and special envoy Saburō Kurusu instead delivered it at 2:20 p.m.; Nomura explained that decoding had delayed its preparation. By then, Japanese aircraft had been attacking Oʻahu for approximately an hour. The memorandum reviewed the negotiations and concluded that further talks could not produce an agreement: it neither expressly declared war nor presented an ultimatum threatening hostilities. Japan’s formal declaration against the United States and the United Kingdom followed in an imperial rescript issued at 11:45 a.m. Tokyo time on December 8, several hours after the attacks on American and British possessions had begun. (history.state.gov)\n\nOn December 8, President Franklin D. Roosevelt addressed a joint session of Congress, describing December 7 as “a date which will live in infamy.” His request was specifically for recognition that a state of war with Japan had existed since the previous day’s attack, not for a declaration against every Axis power. The Senate approved the resolution by 82 votes to none, and the House by 388 to one; Representative Jeannette Rankin of Montana cast the sole opposing vote. Roosevelt signed the resolution that day. Besides formally declaring the state of war, it authorized and directed the president to employ the country’s naval and military forces and governmental resources against Japan. (archives.gov)\n\nThe European declarations were separate decisions made three days later. On December 11, Germany and Italy declared war on the United States. Roosevelt then sent Congress a message requesting recognition of a state of war with each country, and American declarations followed that same day. Thus, the December 8 resolution against Japan did not automatically establish war with Germany and Italy; the subsequent declarations extended American belligerency to the principal European Axis powers in World War II. (history.state.gov)\n\nThe apparent December 7–8 discrepancy in accounts of Japan’s opening offensive reflects local calendars on opposite sides of the International Date Line. Pearl Harbor was attacked on December 7 in Hawaii, while the opening attacks in East Asia and the western Pacific were dated December 8 locally. These operations were coordinated but not simultaneous. Japanese troops began landing at Kota Bharu in British Malaya before the Pearl Harbor raid; additional landings at Singora and Patani in southern Thailand opened routes into the peninsula. Japanese forces also invaded Hong Kong on December 8, initially attacking its mainland defenses; the landing on Hong Kong Island came on December 18. Britain declared war on Japan on December 8 in response to attacks on its territories. (govinfo.gov)\n\nThe offensive against American positions likewise comprised distinct air attacks and later landings. Japanese aircraft struck American and Filipino bases in the Philippines on December 8, preceding amphibious operations; Cavite Navy Yard was bombed on December 10. Guam and Wake Island also came under air attack on December 8. Japanese troops landed on Guam on December 10 and overcame its small defending force. Wake’s defenders repelled an initial landing attempt on December 11, but a renewed assault established a beachhead on December 23. These dates distinguish the opening bombardments from the subsequent capture of the islands, rather than treating all the operations as a single December 7 attack. (history.navy.mil)"
    },
    {
      "heading": "Civilian Restrictions and Japanese American Incarceration",
      "text": "On December 7, 1941, Territorial Governor Joseph B. Poindexter placed Hawaii under martial law and suspended the privilege of the writ of habeas corpus, which ordinarily allowed a detained person to challenge confinement before a court. Lieutenant General Walter C. Short became military governor, assuming control over civilian affairs. These measures applied throughout the territory, not only to residents of Japanese ancestry. The Army exercised authority over policing, civilian conduct, and criminal proceedings, substantially displacing ordinary territorial government. Martial law remained in force until October 24, 1944, although some civilian governmental and judicial functions were restored during 1943. (home.nps.gov)\n\nMilitary orders imposed curfews, blackouts, and travel restrictions. The Army censored newspapers, civilian mail, long-distance telephone calls, and cables, and required civilian registration and fingerprinting, except for small children. Military tribunals heard civilian criminal cases without juries, including prosecutions for violations of military regulations. Proceedings could be completed on the day of arrest, sometimes within minutes, and convictions could bring fines or imprisonment. The National Park Service reports that approximately 55,000 civilian cases were heard by military courts, with a conviction rate of about 99 percent. These controls affected the territory’s population broadly and were distinct from the selective arrests and incarceration of particular residents. (home.nps.gov)\n\nArrests in Hawaii began on the day of the attack, drawing on custodial detention lists compiled before the war by federal investigators and military intelligence. Targets included Japanese-language school teachers, Buddhist and Shinto clergy, consular agents, businessmen, and others classified by the authorities as security risks. Kīlauea Military Camp, previously a military recreation facility, received detainees on December 7 and eventually held more than 100 Japanese residents. Sand Island on Oʻahu also became a detention site; confinement occurred at seventeen locations across the islands. Approximately 2,000 people were detained or interned from Hawaii, predominantly people of Japanese ancestry but also Germans and Italians; about one-third were American citizens. Some were subsequently transferred to mainland camps. Hawaii’s program remained selective rather than becoming the wholesale removal imposed on Japanese American communities along the continental West Coast. (home.nps.gov)\n\nOn February 19, 1942, President Franklin D. Roosevelt signed Executive Order 9066, authorizing the secretary of war and designated military commanders to establish military areas from which any or all persons could be excluded. The order did not name Japanese Americans or itself prescribe a camp system. Subsequent military proclamations and exclusion orders implemented the removal program, while Public Law 503, enacted on March 21, made violations of military-area restrictions a criminal offense. Under Lieutenant General John L. DeWitt’s Western Defense Command, people of Japanese ancestry were forced from West Coast communities into temporary assembly centers and then guarded inland camps. Approximately 120,000 people were incarcerated in this mass program, including nearly 70,000 American citizens. Ten principal camps administered by the War Relocation Authority included Manzanar and Tule Lake in California, Heart Mountain in Wyoming, and Jerome and Rohwer in Arkansas. (archives.gov)\n\nJapanese American incarceration encompassed legally distinct forms of confinement. Enemy-alien internment concerned selected noncitizen nationals of countries at war with the United States, including Japan, Germany, and Italy; the Alien Enemies Act did not apply to American citizens. By contrast, the West Coast exclusion and War Relocation Authority program confined citizens and noncitizens alike on the basis of Japanese ancestry, without individual criminal trials. Many first-generation Japanese immigrants, or Issei, remained noncitizens because immigration and nationality law barred their naturalization; Japanese immigrants gained eligibility to naturalize in 1952. Their American-born children, or Nisei, were citizens. Accordingly, “incarceration” describes the broader removal and confinement program more precisely than using “internment” indiscriminately for every person and camp. (home.nps.gov)"
    },
    {
      "heading": "Official Investigations and the Historical Record",
      "text": "The removal of the Hawaiian commanders preceded the first comprehensive inquiry. Orders relieving Admiral Husband E. Kimmel and Lieutenant General Walter C. Short were issued on December 16, 1941; Vice Admiral William S. Pye assumed temporary command of the Pacific Fleet on December 17. On December 18, President Franklin D. Roosevelt established the Roberts Commission, chaired by Supreme Court Justice Owen J. Roberts, to determine the facts of the attack and identify any contributing derelictions of duty or errors of judgment. Its report, submitted on January 23, 1942, charged Kimmel and Short with dereliction of duty. This was an investigative finding, not a court-martial conviction: the proceedings did not provide the evidentiary rules and rights of defense applicable in a military trial. (esd.whs.mil)\n\nSubsequent inquiries differed in purpose and access to evidence. Admiral Thomas C. Hart’s 1944 inquiry concentrated on preserving testimony from naval personnel whose wartime assignments might make them unavailable. The Army Pearl Harbor Board, sitting from July 20 to October 20, 1944, investigated the facts and recommended action; the Naval Court of Inquiry, sitting from July 24 to October 19, was also directed to identify offenses or serious blame and recommend further proceedings. Both examined responsibilities in Washington as well as Hawaii. The army board criticized failures to inform Short adequately; the naval court found no offenses by Kimmel and criticized Admiral Harold R. Stark’s handling of warnings. Their intelligence evidence was uneven: MAGIC material entered the army proceedings only in the final week, whereas the naval court examined it in classified testimony. Carter W. Clarke’s inquiry investigated the handling of secret communications, while Henry C. Clausen’s and H. Kent Hewitt’s investigations supplemented the army and navy records during 1944–1945. (ibiblio.org)\n\nCongress created a ten-member joint committee in September 1945, chaired by Senator Alben W. Barkley, to examine events before and after the attack. Public hearings began on November 15, 1945, and continued into May 1946, taking testimony from 44 witnesses, including Kimmel, Short, Cordell Hull, and former ambassador Joseph C. Grew. The published record incorporated earlier investigations alongside diplomatic correspondence, military messages, and intelligence exhibits. The report ordered printed on July 20, 1946, contained majority findings signed by eight members and a minority report by Senators Homer Ferguson and Owen Brewster. The majority identified failures in both Hawaiian commands and Washington departments but characterized them as errors of judgment rather than derelictions of duty; the minority disputed the allocation of responsibility and completeness of the record. These were congressional conclusions, not judicial verdicts. (ibiblio.org)\n\nMAGIC was the designation for intelligence obtained by decrypting and translating Japanese diplomatic communications, including messages protected by the PURPLE cipher system. Army and navy specialists’ work in cryptography exposed negotiating positions, diplomatic deadlines, and instructions to Japanese representatives, but did not supply the carrier force’s operational orders. Distribution was tightly restricted to selected senior officials; Kimmel and his intelligence officer Edwin T. Layton did not receive the diplomatic decrypts directly. The later publication The “MAGIC” Background of Pearl Harbor distinguishes a message’s transmission date from its translation date: the latter establishes the earliest possible availability of its contents, not proof that a particular official read it. Its compilers also explicitly distinguished their documentary collection from a definitive history. (nsa.gov)\n\nReconstruction therefore requires comparison of contemporaneous records with later testimony. Ship logs document alarms, firing, damage, and rescue operations, but also preserve mistaken reports generated during the attack. USS Cummings, for example, recorded an air raid at 7:58 a.m.; other entries reported invasion forces that did not exist. American and captured Japanese photographs provide separate evidence of aircraft operations and damage. Hearing transcripts establish what witnesses later recalled, while dated intercepts help distinguish information available before December 7 from knowledge acquired afterward. This record documents deficiencies in warning, intelligence distribution, and defensive preparation; the congressional majority rejected assertions that Roosevelt deliberately induced the attack, and diplomatic decrypts do not establish precise advance knowledge of the carrier strike’s target and timing. (archives.gov)"
    },
    {
      "heading": "Memorials, Historic Sites, and Remembrance",
      "text": "The USS Arizona Memorial developed from wartime proposals into a publicly authorized, jointly funded commemorative structure. Hawaii’s territorial government established the Pacific War Memorial Commission in 1949; in 1950, Admiral Arthur Radford ordered a flagpole erected above the wreck, and a commemorative plaque followed that December. President Dwight D. Eisenhower approved legislation authorizing the memorial in 1958. Public contributions, government support, and fundraising—including Elvis Presley’s 1961 benefit concert—financed construction. Designed by Honolulu architect Alfred Preis and dedicated on May 30, 1962, the 184-foot structure spans the submerged battleship. Its lowered center and elevated ends were intended to represent initial defeat and eventual victory. An assembly area provides views of the wreck, while the shrine room’s marble wall records the names of the 1,177 sailors and Marines killed aboard Arizona. More than 900 remain within the ship, making the site both a memorial and a military grave. (nps.gov)\n\nOther memorials preserve distinct relationships between ships, casualties, and place. On Ford Island’s western shore, the USS Utah Memorial overlooks the wreck of the former battleship and target ship, whose sinking killed 58 crew members. Digital interpretation developed by the National Park Service, Pacific Historic Parks, and CyArk combines three-dimensional documentation of the memorial and exposed wreck with underwater surveys, historical images, and survivor accounts. The USS Oklahoma Memorial, dedicated on December 7, 2007, stands near the ship’s former berth. Its 429 named white marble columns commemorate individual casualties and evoke sailors standing at attention; black granite elements suggest the battleship’s hull. Unlike Arizona and Utah, Oklahoma does not remain beside its memorial: after salvage, it sank at sea while being towed to the mainland in 1947. (nps.gov)\n\nPreserved installations extend interpretation beyond the waterfront. The Pearl Harbor Aviation Museum uses Ford Island’s wartime hangars, including Hangar 79, completed in 1941 as an aircraft maintenance and engine-repair facility. Bullet-perforated glazing remains physical evidence of December 7, although the museum notes that some damage may have resulted from American fire directed at returning aircraft that evening. At Hickam, the former consolidated barracks, subsequently used as Pacific Air Forces headquarters, retains bullet and shrapnel scars. Wheeler Army Airfield received National Historic Landmark designation in August 1987, recognizing the airfield’s historical significance. These surviving buildings retain evidence of the attack within installations that continued to serve military functions. (pearlharboraviationmuseum.org)\n\nOral history and archival collections preserve experiences not fully represented by ships and buildings. The National Park Service’s project records military personnel and civilians who witnessed the attack on Oʻahu. Its audio archive includes Clarendon Hetrick’s account of escaping Arizona, recorded on December 6, 1985; Walter Staff’s description of rescue from the overturned Oklahoma, recorded on December 4, 1986; and Sterling Cale’s recollections of events at the naval shipyard, recorded in 2004. Letters, diaries, and photographs supplement these interviews. Anniversary ceremonies also provide a recurring setting for remembrance: the joint Navy–National Park Service ceremony on December 7, 2015, included wreath presentations, military honors, and a moment of silence at 7:55 a.m. Hawaiian time. (nps.gov)\n\nStewardship of the submerged wrecks combines archaeological documentation with respect for human remains. At Arizona, divers and remotely operated vehicles investigate hull deterioration, interior conditions, and oil leakage; monitoring informs preservation without treating the vessel as an ordinary salvage resource. Authorized interments of deceased Arizona survivors place their ashes within the wreck, extending its burial function. The attack memorials have a different interpretive focus from nearby institutions addressing the wider Pacific conflict. The Battleship Missouri Memorial, for example, interprets the ship on which Japan signed the Instrument of Surrender in Tokyo Bay on September 2, 1945—an event nearly four years after the attack, rather than part of the December 1941 battlefield. (nps.gov)"
    }
  ],
  "links": [
    "united-states",
    "japan",
    "china",
    "world-war-ii",
    "second-sino-japanese-war",
    "philippines",
    "southeast-asia",
    "logistics",
    "radar",
    "infrastructure",
    "united-kingdom",
    "franklin-d-roosevelt",
    "nazi-germany",
    "italy",
    "hong-kong",
    "cryptography",
    "photography",
    "archaeology"
  ],
  "sources": [
    {
      "title": "Japan, China, the United States and the Road to Pearl Harbor, 1937–41",
      "url": "https://history.state.gov/milestones/1937-1945/pearl-harbor"
    },
    {
      "title": "Memorandum by the Adviser on Political Relations (Hornbeck), July 31, 1941",
      "url": "https://history.state.gov//historicaldocuments/frus1941v04/d671fn19"
    },
    {
      "title": "Press Release Issued by the White House on September 26, 1940",
      "url": "https://history.state.gov/historicaldocuments/frus1931-41v02/d144"
    },
    {
      "title": "Federal Reserve Bank of New York Circular Series, July 26, 1941",
      "url": "https://fraser.stlouisfed.org/files/docs/historical/ny%20circulars/1941_02249.pdf"
    },
    {
      "title": "Memorandum by the Assistant Secretary of State (Acheson) to the Under Secretary of State (Welles)",
      "url": "https://history.state.gov/historicaldocuments/frus1941v04/d682"
    },
    {
      "title": "The US-Japan War Talks as Seen in Official Documents: Oil Export Restrictions",
      "url": "https://www.jacar.go.jp/english/exhibition/nichibei/popup/pop_13.html"
    },
    {
      "title": "Commonwealth Government to Lord Cranborne, U.K. Secretary of State for Dominion Affairs",
      "url": "https://www.dfat.gov.au/about-us/publications/historical-documents/Pages/volume-05/20-commonwealth-government-to-lord-cranborne-uk-secretary-of-state-for-dominion-affairs"
    },
    {
      "title": "The Secretary of State to the Ambassador in the United Kingdom (Winant), November 24, 1941",
      "url": "https://history.state.gov/historicaldocuments/frus1941v04/d473"
    },
    {
      "title": "Foreign Relations of the United States, 1941, Volume IV: Contents",
      "url": "https://history.state.gov//historicaldocuments/frus1941v04/ch6"
    },
    {
      "title": "The Secretary of State to the Ambassador in Japan (Grew), November 26, 1941",
      "url": "https://history.state.gov/historicaldocuments/frus1941v04/d486"
    },
    {
      "title": "United States Note to Japan",
      "url": "https://teachingamericanhistory.org/document/united-states-note-to-japan/"
    },
    {
      "title": "The Japanese-Chinese Joint History Research Report",
      "url": "https://www.mofa.go.jp/mofaj/files/100512970.pdf"
    },
    {
      "title": "The Pearl Harbor Attack (U.S. National Park Service)",
      "url": "https://home.nps.gov/articles/pearlattackww2.htm"
    },
    {
      "title": "HyperWar: USSBS: Campaigns of the Pacific War",
      "url": "https://www.ibiblio.org/hyperwar/AAF/USSBS/PTO-Campaigns/USSBS-PTO-2.html"
    },
    {
      "title": "Chapter XV: The War Reaches America",
      "url": "https://webdoc.sub.gwdg.de/ebook/p/2005/CMH_2/www.army.mil/cmh-pg/books/wwii/csppp/ch15.htm"
    },
    {
      "title": "United States Army in World War II: Guarding the United States and Its Outposts",
      "url": "https://history.army.mil/Portals/143/Images/Publications/Publication%20By%20Title%20Images/G%20Pdf/CMH_Pub_4-2.pdf?ver=Z-tG3rA5oWJEhCVYk7ZthQ%3D%3D"
    },
    {
      "title": "Events from January through September 1941",
      "url": "https://www.ibiblio.org/pha/pha/army/chap_3b.html"
    },
    {
      "title": "7 December 1941: The Air Force Story, Chapter 1",
      "url": "https://www.ibiblio.org/hyperwar/AAF/7Dec41/7Dec41-1.html"
    },
    {
      "title": "XXXII. Conditions at Pearl Harbor Prior to Attack",
      "url": "https://www.ibiblio.org/pha/pha/narrative/32.html"
    },
    {
      "title": "Pearl Harbor Attack Hearings: Report of the Army Pearl Harbor Board",
      "url": "https://www.ibiblio.org/pha/congress/Vol39.pdf"
    },
    {
      "title": "Timeline - Pearl Harbor National Memorial",
      "url": "https://www.nps.gov/perl/learn/historyculture/timeline.htm"
    },
    {
      "title": "National Register of Historic Places: Japanese Midget Submarine HA-19",
      "url": "https://npgallery.nps.gov/NRHP/GetAsset/NHLS/89001428_text"
    },
    {
      "title": "Opana Mobile Radar Site - Pearl Harbor National Memorial",
      "url": "https://www.nps.gov/perl/learn/historyculture/opana-mobile-radar-site.htm"
    },
    {
      "title": "The Attack on Pearl Harbor, December 7, 1941",
      "url": "https://cnrh.cnic.navy.mil/About/History/The-Attack-on-Pearl-Harbor/"
    },
    {
      "title": "Battlefield O'ahu - Pearl Harbor National Memorial",
      "url": "https://home.nps.gov/perl/learn/historyculture/oahu.htm"
    },
    {
      "title": "Wheeler Field",
      "url": "https://www.nps.gov/articles/wheeler-field.htm"
    },
    {
      "title": "Hawaii Aviation: December 7, 1941",
      "url": "https://aviation.hawaii.gov/world-war-ii/december-7-1941/"
    },
    {
      "title": "CHIPS: Veterans Day Salute to a Navy Chief and His Ship",
      "url": "https://www.doncio.navy.mil/CHIPS/ArticleDetails.aspx?ID=9718"
    },
    {
      "title": "Civilian Casualties - Pearl Harbor National Memorial",
      "url": "https://www.nps.gov/perl/learn/historyculture/civilian-casualties.htm"
    },
    {
      "title": "World War II - Asiatic-Pacific Theater",
      "url": "https://history.army.mil/Research/Reference-Topics/Army-Campaigns/Brief-Summaries/World-War-II/World-War-II-Asiatic-Pacific-Theater/"
    },
    {
      "title": "SUMMARY OF THE PEARL HARBOR ATTACK",
      "url": "https://aviation.hawaii.gov/wp-content/uploads/2015/06/Summary-of-the-Attack-December-7-1941.pdf"
    },
    {
      "title": "Remembering Pearl Harbor",
      "url": "https://www.defense.gov/multimedia/experience/remembering-pearl-harbor/"
    },
    {
      "title": "7 December 1941: The Air Force Story",
      "url": "https://www.govinfo.gov/content/pkg/GOVPUB-D301-PURL-LPS47830/pdf/GOVPUB-D301-PURL-LPS47830.pdf"
    },
    {
      "title": "Japanese Mini Submarines at Pearl Harbor",
      "url": "https://sanctuaries.noaa.gov/maritime/japanese-mini-subs/"
    },
    {
      "title": "Pearl Harbor Naval Shipyard Remembers USS Oklahoma",
      "url": "https://www.navy.mil/Press-Office/News-Stories/display-news/Article/2867092/pearl-harbor-naval-shipyard-remembers-uss-oklahoma/"
    },
    {
      "title": "Papers Relating to the Foreign Relations of the United States, Japan, 1931–1941, Volume II: List of Papers",
      "url": "https://history.state.gov//historicaldocuments/frus1931-41v02/papers"
    },
    {
      "title": "Foreign Relations of the United States, 1941, Volume IV, Document 598",
      "url": "https://history.state.gov/historicaldocuments/frus1941v04/d598"
    },
    {
      "title": "FDR’s “Day of Infamy” Speech",
      "url": "https://www.archives.gov/publications/prologue/2001/winter/crafting-day-of-infamy-speech.html"
    },
    {
      "title": "S.J. Res. 116, Declaration of War on Japan, December 8, 1941",
      "url": "https://www.visitthecapitol.gov/artifact/sj-res-116-declaration-war-japan-december-8-1941"
    },
    {
      "title": "Declaration by the United States of America of a State of War With Japan, December 8, 1941",
      "url": "https://history.state.gov/historicaldocuments/frus1931-41v02/d423"
    },
    {
      "title": "Message of President Roosevelt to the Congress, December 11, 1941",
      "url": "https://history.state.gov/historicaldocuments/frus1941v01/d586"
    },
    {
      "title": "Chronology, 1941–1945",
      "url": "https://www.govinfo.gov/content/pkg/GOVPUB-D114-PURL-gpo90095/pdf/GOVPUB-D114-PURL-gpo90095.pdf"
    },
    {
      "title": "Invasion of Malaya",
      "url": "https://www.awm.gov.au/collection/E84717"
    },
    {
      "title": "Chapter 8: Invasion of Malaya",
      "url": "https://s3-ap-southeast-2.amazonaws.com/awm-media/collection/RCDIG1070101/document/5519430.PDF"
    },
    {
      "title": "80th Anniversary of Victory in the War of Resistance: The Siege",
      "url": "https://www.grs.gov.hk/ws/online/80VWR/en/sec1/index.html"
    },
    {
      "title": "Memorandum by Mr. Theodore G. Achilles of the Division of European Affairs",
      "url": "https://history.state.gov/historicaldocuments/frus1941v04/d549"
    },
    {
      "title": "Japanese Detention at Hawaiʻi Volcanoes",
      "url": "https://home.nps.gov/havo/learn/historyculture/japanese-detention.htm"
    },
    {
      "title": "The American Home Front During World War II: Incarceration and Martial Law",
      "url": "https://home.nps.gov/articles/000/wwii-home-front-incarceration-and-martial-law.htm"
    },
    {
      "title": "Martial Law in Hawai'i",
      "url": "https://www.nps.gov/hono/learn/historyculture/martial-law-in-hawai-i.htm"
    },
    {
      "title": "A Brief History of Japanese American Relocation During World War II",
      "url": "https://home.nps.gov/articles/historyinternment.htm"
    },
    {
      "title": "Historical Overview",
      "url": "https://www.nps.gov/hono/learn/historical-overview.htm"
    },
    {
      "title": "Executive Order 9066: Resulting in Japanese-American Incarceration (1942)",
      "url": "https://www.archives.gov/milestone-documents/executive-order-9066"
    },
    {
      "title": "On display: Executive Order 9066 and the Civil Liberties Act of 1988",
      "url": "https://prologue.blogs.archives.gov/2013/07/17/on-display-executive-order-9066-and-the-civil-liberties-act-of-1988/"
    },
    {
      "title": "World War II Japanese American Incarceration: Researching an Individual or Family",
      "url": "https://www.archives.gov/research/aapi/ww2/genealogy"
    },
    {
      "title": "Terminology and the Mass Incarceration of Japanese Americans during World War II",
      "url": "https://home.nps.gov/articles/000/terminology-and-the-mass-incarceration-of-japanese-americans-during-world-war-ii.htm"
    },
    {
      "title": "Glossary of terms related to Japanese American Confinement",
      "url": "https://home.nps.gov/articles/000/glossary-of-terms-related-to-japanese-american-confinement.htm"
    },
    {
      "title": "Japanese American Incarceration",
      "url": "https://www.nps.gov/subjects/worldwarii/confinement.htm"
    },
    {
      "title": "The Personnel Actions",
      "url": "https://www.esd.whs.mil/Portals/54/Documents/FOID/Reading%20Room/Personnel_Related/16-F-1171%20Dorn%20Report%20on%20Kimmel%20and%20Short%201995.pdf"
    },
    {
      "title": "Prior Investigations Concerning the Pearl Harbor Attack",
      "url": "https://www.ibiblio.org/pha/pha/congress/app-a.html"
    },
    {
      "title": "The Investigations",
      "url": "https://www.nsa.gov/History/Cryptologic-History/Historical-Events/Article-View/Article/2740707/the-investigations/"
    },
    {
      "title": "Investigation of the Pearl Harbor Attack",
      "url": "https://www.ibiblio.org/pha/pha/congress/part_0.html"
    },
    {
      "title": "Joint Committee on the Investigation of the Pearl Harbor Attack",
      "url": "https://www.senate.gov/about/powers-procedures/investigations/pearl-harbor.htm"
    },
    {
      "title": "New National Archives Video Short Gives Fresh Look at Pearl Harbor Attack",
      "url": "https://www.archives.gov/press/press-releases/2012/nr12-42"
    },
    {
      "title": "Records from the Day of Infamy",
      "url": "https://prologue.blogs.archives.gov/2011/12/07/records-from-the-day-of-infamy/"
    },
    {
      "title": "USS Arizona",
      "url": "https://www.nps.gov/perl/learn/historyculture/uss-arizona.htm"
    },
    {
      "title": "USS Utah Memorial",
      "url": "https://www.nps.gov/places/uss-utah-memorial.htm"
    },
    {
      "title": "USS Oklahoma Memorial",
      "url": "https://www.nps.gov/valr/learn/historyculture/upload/OKLA%20Site%20Bulletin.pdf"
    },
    {
      "title": "USS Oklahoma Memorial",
      "url": "https://www.nps.gov/places/uss-oklahoma-memorial.htm"
    },
    {
      "title": "Historic Hangar 79",
      "url": "https://www.pearlharboraviationmuseum.org/blog/historic-hangar-79-ford-island/"
    },
    {
      "title": "In the Line of Fire",
      "url": "https://www.pearlharboraviationmuseum.org/wp-content/uploads/2020/04/pearl-harbor-you-are-there.pdf"
    },
    {
      "title": "Hickam quiet on this Dec. 7",
      "url": "https://www.af.mil/News/Article-Display/Article/132535/hickam-quiet-on-this-dec-7/"
    },
    {
      "title": "Oral History Interviews",
      "url": "https://www.nps.gov/perl/learn/historyculture/oral-history-interviews.htm"
    },
    {
      "title": "Audio Archive",
      "url": "https://www.nps.gov/perl/learn/photosmultimedia/sound-library.htm"
    },
    {
      "title": "Pearl Harbor Commemorative Events",
      "url": "https://www.nps.gov/perl/learn/news/pearl-harbor-anniversary-events.htm"
    }
  ],
  "license": "https://creativecommons.org/licenses/by/4.0/"
}