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Tension between Japan and the United States increased in the 1930s. During the 1930s, they begin to talk about starting a war.
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Tensions seriously began to grow after the 1931 Japanese invasion of Manchuria.
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In 1937, an all out war began. It was a military conflict between the Republic of China and the Empire of Japan.
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In 1940, following Japan's invasion of French Indochina, the United States halted shipments of airplanes, parts, machine tools. The Japanese took this as an unfriendly act.
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In July of 1941 the United States ceased oil exports to Japan. Part of the reason they ceased oil exports is because of new American restrictions on domestic oil consumption.
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On November 26, 1941 a Japanese task force of 6 aircraft carriers departed northern Japan to a position to northwest of Hawaii. Its intentions were to launch its aircrafts on Pearl Harbor.
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Pearl Harbor was attacked by the Japanese on the morning of December 7, 1941. It resulted in the United States' entry to World War 2.
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At 7:48, Hawaiian time, Japanese planes began attacking Pearl Harbor. A total of 353 Japanese planes were launched in two seperate waves.
