Question

why did USA participated in second world war? give in answer in detail.
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Answer 1

Answer:

Although the war began with Nazi Germany's attack on Poland in September 1939, the United States did not enter the war until after the Japanese bombed the American fleet in Pearl Harbor, Hawaii, on December 7, 1941.

Explanation:

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Answer 2

Answer:

By 1944 America led the world in arms production, making more than enough to fill its military needs. At the same time, the United States was providing its allies in Great Britain and the Soviet Union with critically needed supplies. Many Americans volunteered to defend the nation from enemy bombing or invasion.