On June 3 , 1942 , the Japanese launched an air attack on Dutch Harbor , a U.S. naval base on Unalaska Island .
On June 3 , 1942 , the Japanese were repelled by U.S. forces .
On June 3 , 1942 , the Japanese launched an air attack on Dutch Harbor , a U.S. naval base on Unalaska Island , but were repelled by U.S. forces .