Question

number of enlistment cards
which event led to the peak of 3,030,407 enlistments for us military service in 1942?
o the blitzkrieg of london by german air forces
the declaraton of war by the soviet union on germany
the attack on the pearl harbor naval base by japan
the discovery of concentration camps in poland

Explanation:

The attack on Pearl Harbor by Japan on December 7, 1941, led the US to enter World War II. This event significantly increased enlistments in 1942 as Americans responded to the call to defend their country. The Blitzkrieg of London (1940 - 1941) was a German action in Europe not directly causing a US enlistment spike. The Soviet - German war declaration (1941) was a Soviet action. The discovery of concentration camps (later in the war) was a revelation of atrocities but not the main cause of the 1942 enlistment peak.

Answer:

C. the attack on the Pearl Harbor naval base by Japan