Pearl Harbor was attacked by 353 Japanese aircraft in two waves on December 7, 1941, killing 2,402 Americans and wounding 1,282. During WWII, approximately 400,000 US women served in the armed forces and more than 543 lost their lives. President Roosevelt required all Japanese Americans living on the West Coast to be imprisoned in internment camps. More than 85 million Americans purchased war bonds totaling $185.7 billion to finance the war.