Blooket World War II History Practice Test 2026 - Free World War II History Practice Questions and Study Guide

The direct trigger was the surprise Japanese attack on Pearl Harbor on December 7, 1941. This assault crippled the U.S. Pacific Fleet and shocked the nation, prompting President Franklin D. Roosevelt to ask Congress for a declaration of war against Japan. Congress approved it, and within days Germany and Italy declared war on the United States, bringing the country fully into World War II. The other events listed were important parts of the war’s broader context, but they did not by themselves draw the United States in.