Question

why did america enter the 2nd world war​

Answer 1

Answer:

The US got involved in WWII because the Imperial Empire of Japan attacked and bombed the US naval base at Pearl Harbor on December 7, 1941. Japan attacked to US because the US had stopped shipments of crude and refined oil and other supplies to Japan.

Explanation:

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Answer 2

Answer:

Global in scale and in its repercussions, World War II created a new world at home and abroad. ... 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.