At 7:48 on the morning of the 7th December 1941, the Imperial Japanese Navy launched a surprise attack against the United States’ Hawaiian naval base at Pearl Harbor. Sixteen US Navy ships were sunk or damaged by 353 Japanese fighter, bomber and torpedo planes. Nearly 2,500 American servicemen were killed, with another 1,000 injured. The Japanese lost just 64 men.

Japan chose to attack Pearl Harbor in order to prevent the U.S. Pacific Fleet from becoming involved in Japan’s advance into Southeast Asia, particularly British-controlled Malaya and the Dutch East Indies. Although the United States was not involved in the Second World War at the time, it had previously provided financial support to the Republic of China in the Sino-Japanese War and stopped selling equipment such as aeroplanes, parts and aviation fuel to Japan in1940. Remaining oil shipments were stopped in July 1941.

Japan’s military commanders became convinced that the USA would eventually intervene as they advanced further into Southeast Asia. On the 26th November, the main Japanese attack fleet left port for Pearl Harbour. However, Emperor Hirohito only gave final approval for the attack on the 1st December. By this point most Americans expected imminent war with Japan, but the attack on Pearl Harbour caught everyone by surprise.

At 7:48am on the 7th December the first wave of Japanese planes began their attack. The entire assault was over within 90 minutes. The following morning, President Franklin D. Roosevelt described it as “a date which will live in infamy” and called for Congress to declare war on the Empire of Japan. They did so less than an hour later.

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