World War II: Mobilization

AP US History· difficulty 3/5

The U.S. entered WWII after

  • A

    The Soviet entry into the war against Finland

  • B

    A formal British request for military assistance

  • C

    Germany's invasion of Poland in September 1939

  • D

    Japan's surprise attack on Pearl Harbor, December 7, 1941

    check_circle

Explanation

Congress declared war on Japan the next day; Germany then declared war on the U.S.

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