The attack on Pearl Harbor on December 7, 1941, resulted in the loss of more than 2,400 lives. As a surprise move by Japan, the early morning airborne offensive destroyed numerous American naval vessels and airplanes. The USS Arizona, a battleship in port at the Hawaii base, sank with more than 1,000 sailors on board and continues to leak oil into the Pacific Ocean. In the immediate aftermath of the Pearl Harbor attack, the United States officially declared war on Japan and entered World War Two