What was the immediate impact of the 1939 German and Soviet invasion of Poland? A. The United States declared war on Germany but did not send troops
B. Great Britain and France declared war on Germany but not on the Soviet Union
C. Germany conquered all of Poland but provoked a war with the Soviet Union
D. Japan, Italy, Germany formed an alliance but did not offer one another military aid.

A) The United States declared war on Germany but did not send troops.

Explanation:

The period of war following the invasion of Poland is referred to as the "Phony War", because the Allies declared war, but there was very little actual action until the Germans invaded France and the Low Countries in the whole of Western Europe.

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