After the attack on Pearl Harbor on December 7, 1941, the United States entered World War II. On December 8, Congress declared war on Japan, and on December 11, the United States entered into war with Germany.
Japan initiated two waves of attacks on the American naval base at Pearl Harbor, Hawaii. In the first wave, 181 Japanese planes, including dive bombers, torpedo bombers and fighter jets, attacked the fleet at Pearl Harbor as well as military airfields, Navy air bases, Army Air Corps stations and other fleets. In the second wave, 170 planes attacked more American battleships. Overall, 350 aircraft and eight battleships were destroyed or damaged, but the Japanese failed to damage any aircraft carriers.
President Roosevelt delivered the Day of Infamy speech on December 8, 1941. He asked Congress to declare war on Japan.