Question

What finally brought America into the war?

Answer 1

German Atrocities in Belgium. One factor that had a major influence on American public opinion was the invasion of neutral Belgium and stories of German atrocities in the country

Answer 2

Answer: Japanese attack on Pearl Harbor

Explanation: Larger historical forces eventually brought the United States to the brink of World War II, but the direct and immediate cause that led it to officially entering the war was the Japanese attack on Pearl Harbor.