Question

what is the reason for the entry of the US in the Second World War

Answer 1

The most immediate reason for the US's actual entry into WWII was the Japanese attack on the US naval base at Pearl Harbor in what was then the Territory of Hawaii. The Japanese attack led to the US declaring war on Japan. From there, Germany declared war on the US and the US was fully involved.

Answer 2

Attack of Japan on pearl harbour of American naval base made America to enter into the second world war.....
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