On December 7th, 1941, The Japanese Army launched an attack on Pearl Harbor in Hawaii. . At around 8 in the morning, hundreds of Japanese fighter planes destroyed or damaged nearly 20 American naval vessels, including eight battleships, and over 300 airplanes. More than 2,400 Americans died in the attack, including civilians, and another 1,000 people were wounded. The day after the assault, President Franklin D. Roosevelt asked Congress to declare war on Japan.