Question

Which action promoted the United States to officially enter World War II?

a. The German use of blitzkrieg tactics in Europe
b. Japanese military actions in Indochina
c. German submarine attacks on U.S merchant ships
d. The Japanese bombing of a U.S military base

Answer 1

The action that prompted the United States to officially enter World War II was d. The Japanese bombing of a U.S military base.

Step-by-step explanation:

The United States entered World War II due to the Japanese bombing of Pearl Harbor on December 7, 1941, which was a decisive factor in changing American public opinion and policy.Specifically, this was the attack on Pearl Harbor on December 7, 1941. Prior to this event, tensions had been escalating due to Japan's expansionist actions in Asia and restrictive trade policies implemented by the United States against Japan.

The surprise attack on Pearl Harbor galvanized American public opinion and led to a declaration of war against Japan, and subsequently, since Japan was allied with Germany and Italy through the Tripartite Pact, against those nations as well. America's entry into the conflict marked a significant turning point in the military history of World War II.