Pearl Harbor Day

Attack on Pearl Harbor

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The attack on Pearl Harbor was a preventive military strike on the United States Pacific Fleet base at Pearl Harbor, Hawaii by the Empire of Japan's Imperial Japanese Navy, on the morning of Sunday, December 7, 1941. Two attack waves, totaling 350 aircraft, were launched from six IJN aircraft carriers which destroyed two U.S. Navy battleships, one minelayer, two destroyers and 188 aircraft. Personnel losses were 2,333 killed and 1,139 wounded. Damaged warships included three cruisers, a destroyer, and six battleships. Of those six, one was deliberately grounded and was later refloated and repaired. Two sank at their berths but were later repaired and both rejoined the fleet late in the war. Vital fuel storage, shipyards, and submarine facilities were not hit. Japanese losses were minimal at 29 aircraft and five midget submarines, with 65 Japanese servicemen killed or wounded.

The intent of the strike was to protect Imperial Japan's advance into Malaya and the Dutch East Indies – for their natural resources such as oil and rubber – by neutralizing the U.S. Pacific Fleet. Both the US and Japan had long-standing contingency plans for war in the Pacific, developed during the 1930s as tension between the two countries steadily increased, focusing on the other's battleships. Japan's expansion into Manchuria and later French Indochina were greeted with increasing levels of embargoes and sanctions from the United States. In 1940, the US halted further shipments of airplanes, parts, machine tools and aviation gas to Japan, which Japan interpreted as an unfriendly act. America continued to export oil to Japan, as it was understood in Washington that cutting off exports could mean Japanese retaliation.   In the summer of 1941, the US ceased the export of oil to Japan due to Japan's continued aggressive expansionist policy and because an anticipated eventual American entrance to the war in Europe prompted increased stockpiling and less commercial use of gasoline.   President Franklin D. Roosevelt had moved the fleet to Hawaii, and ordered a buildup in the Philippines, to reduce Japanese aggression in China and deter operations against others, including European colonies in Asia. The Japanese high command was (mistakenly) certain any attack on the United Kingdom's colonies would inevitably bring the U.S. into the war.  A pre-emptive strike appeared the only way Japan could avoid U.S. interference in the Pacific. The attack was one of the most important engagements of World War II. Occurring before a formal declaration of war, it shocked the American public out of isolationism.  Rooseveltcalled December 7, 1941"… a date which will live in infamy."