Japan's attack on Pearl Harbor took place on December 7, 1941. The U.S. military suffered 18 ships damaged or sunk, and 2,400 people were killed. Its most significant consequence was the entrance of the United States into World War II. The US had previously been officially neutral but subsequently entered the Pacific War, the Battle of the Atlantic and the European theatre of war. Following the attack, the US interned 120,000 Japanese Americans, 11,000 German Americans, and 3,000 Italian Americans.
