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Consequences of the attack on Pearl Harbor From Wikipedia, the free encyclopedia Jump to navigationJump to search Hideki Tojo, Japanese Prime Minister at the time of the attack Japan's attack on Pearl Harbor took place on December 7, 1941. The U.S. military suffered 18 ships damaged or sunk, and 2,400 people were killed. Its most significant consequence was the entrance of the United States into World War II. The US had previously been neutral but subsequently entered the Pacific War, the Battle of the Atlantic and the European theatre of war. Following the attack, the US interned 120,000 Japanese Americans, 11,000 German Americans, and 3,000 Italian Americans. Contents 1American public opinion prior to the attack 2American response 3Japanese views 4Germany and Italy declare war 5British reaction 6Canadian response 7Investigations and blame 8Rise of anti-Japanese sentiment and historical significance 9Perception of the attack today o 9.1Revisionism controversies 10Analysis o 10.1Tactical implications . 10.1.1Battleships . 10.1.2Carriers . 10.1.3Shore installations . 10.1.4Charts o 10.2Strategic implications 11See also 12Notes 13External links American public opinion prior to the attack[edit] From the outbreak of World War II on September 1, 1939 to December 8, 1941, the United States was officially neutral, as it was bound by the Neutrality Acts not to get involved in the conflicts raging in Europe and Asia. Prior to the attack on Pearl Harbor, public opinion in the United States had not been unanimous. When polled in January 1940, 60% of Americans were in favor of helping the United Kingdom in the war.[1] A majority of Americans believed that the safety of the United States was contingent on the UK winning the war, and an even larger majority believed that the UK would lose the war if the United States stopped supplying war materials.[1] Despite this, the same poll reported that 88% of Americans would not support entering the war against Germany and Italy.[1] Public support for assisting the United Kingdom rose through 1940, reaching about 65% by May 1941.[2] However, 80% disapproved of war against Germany and Italy.[1] Americans were more unsure on the prospect of conflict with Empire of Japan around the same time frame. In a February Gallup poll, a majority believed that the United States should intervene in Japan's conquest of the Dutch East Indies and Singapore.[1] However, in the same poll, only 39% supported going to war with Japan, while 46% opposed the prospect.[1] American response[edit] President Franklin D. Roosevelt signing the declaration of war against Japan on the day following the attack On December 7, 1941, the Japanese launched a surprise attack on the U.S. naval base at Pearl Harbor. After two hours of bombing, 21 U.S. ships were sunk or damaged, 188 U.S. aircraft were destroyed, and 2,403 people were killed. All of this happened while the U.S. and Japan were officially engaging in diplomatic negotiations for possible peace in Asia. The day after the attack, President Franklin D. Roosevelt addressed a joint session of the 77th United States Congress, calling December 7 "a date which will live in infamy". Within an hour of Roosevelt's speech, Congress declared war on the Empire of Japan amid outrage at the attack, the deaths of thousands of Americans, and Japan's deception of the United States by engaging in diplomatic talks with the country during the entire event. Pacifist Representative Jeannette Rankin, a Republican from Montana, cast the only dissenting vote. Roosevelt signed the declaration of war later the same day. Continuing to intensify its military mobilization, the U.S. government finished converting to a war economy, a process begun by provision of weapons and supplies to the Soviet Union and the British Empire. Japanese Americans from the West Coast were sent to internment camps for the duration of the war. The attack on Pearl Harbor immediately united a divided nation. Public opinion had been moving towards support for entering the war during 1941, but considerable opposition remained until the attack. Overnight, Americans united against the Empire of Japan in response to calls to "remember Pearl Harbor!" A poll taken between December 12–17, 1941, showed that 97% of respondents supported a declaration of war against Japan.[3] Further polling showed a dramatic increase in support for every able-bodied man serving in the military, up to 70% in December 1941.[4] American solidarity probably made possible the unconditional surrender position later taken by the Axis. Some historians, among them Samuel Eliot Morison, believe the attack doomed Imperial Japan to defeat simply because it had awakened the "sleeping giant", regardless of whether the fuel depots or machine shops had been destroyed or even if the carriers had been caught in port and sunk. America's industrial and military capacity, once mobilized, was able to pour overwhelming resources into both the Pacific and European theaters. Others, such as Clay Blair, Jr.[5] and Mark Parillo[6] believe Japanese trade protection was so incompetent that American submarines alone might have strangled Japan into defeat. The closest friend Roosevelt had in the developing Allied alliance, Sir Winston Churchill, stated that his first thought regarding American assistance to the United Kingdom was that "We have won the war,"[7] very soon after Pearl Harbor was attacked. Perceptions of treachery in the attack before a declaration of war sparked fears of sabotage or espionage by Japanese sympathizers residing in the U.S., including citizens of Japanese descent, and was a factor in the subsequent Japanese internment in the western United States. Other factors included misrepresentations of intelligence information suggesting sabotage, notably by General John L. DeWitt, commanding general of Western Defense Command on the Pacific Coast, who harbored personal feelings against Japanese Americans.[8] In February 1942, Roosevelt signed United States Executive Order 9066, requiring all Japanese Americans to submit themselves for internment. Propaganda made repeated use of the attack, because its effect was enormous and impossible to counter.[9] "Remember Pearl Harbor!" became the watchwords of the war.[10] The American government understated the damage inflicted in the hope of preventing the Japanese from learning it, but the Japanese had, through surveillance, a good estimate.[11] Japanese views[edit] Japanese heroic depiction of nine submarine crewmembers lost during the attack, excluding the POW, Kazuo Sakamaki On December 8, 1941, Japan declared war on the United States and the British Empire. The Japanese document discussed world peace and the disruptive actions of the United States and the United Kingdom. The document stated all avenues for averting war had been exhausted by the government of Japan. Although the Imperial Japanese government had made some effort to prepare their population for war by anti-American propaganda, it appears most Japanese were surprised, apprehensive, and dismayed by the news they were now at war with the U.S., a country many of them admired. Nevertheless, the people at home and overseas thereafter generally accepted their government's account of the attack and supported the war effort until their nation's surrender in 1945.[12] Japan's national leadership at the time appeared to have believed war between the U.S. and Japan had long been inevitable. In any case, relations had already significantly deteriorated since Japan's invasion of China in the early 1930s, which the U.S. strongly disapproved of. In 1942, Saburō Kurusu, former Japanese ambassador to the United States, gave an address in which he talked about the "historical inevitability of the war of Greater East Asia."[13] He said war had been a response to Washington's longstanding aggression toward Japan. Some of the provocations against Japan that he named were the San Francisco School incident, the Naval Limitations Treaty, other unequal treaties, the Nine Power Pact, and constant economic pressure, culminating in the "belligerent" scrap metal and oil embargo in 1941 by the United States and Allied countries to try to contain or reverse the actions of Japan, especially in Indochina, during her expansion of influence and interests throughout Asia. Japan's dependence on imported oil made the trade embargoes especially significant. These pressures directly influenced Japan to ally with Germany and Italy through the Tripartite Pact. According to Kurusu, the actions showed that the Allies had already provoked war with Japan long before the attack at Pearl Harbor and that the U.S. was already preparing for war with Japan. Kurusu also stated, falsely, that the U.S. was looking beyond just Asia to world domination, with "sinister designs".[13] Some of that view seems to have been shared by Adolf Hitler, who called it one of the reasons Germany declared war on the United States. He had many years earlier mentioned European imperialism toward Japan. Therefore, according to Kurusu, Japan had no choice but to defend itself and so should rapidly continue to militarize, bring Germany and Italy closer as allies and militarily combat the United States, Britain, and the Netherlands. Japan's leaders also saw themselves as justified in their conduct, believing that they were building the Greater East Asia Co-Prosperity Sphere. They also explained Japan had done everything possible to alleviate tension between the two nations. The decision to attack, at least for public presentation, was reluctant and forced on Japan. Of the Pearl Harbor attack itself, Kurusu said it came in direct response to a virtual ultimatum from the U.S. government, the Hull note, and so the surprise attack was not treacherous. Since the Japanese-American relationship already had hit its lowest point, there was no alternative.