The attack commenced at 7:55 a.m. On Sunday, December 7, 1941
The attack lasted 110 minutes, from 7:55 a.m. until 9:45 a.m.
The Japanese launched their airplanes in two waves, approximately 45 minutes apart.
The first wave of Japanese planes struck Pearl Harbor at 7:55 a.m. the second wave reached Pearl Harbor around 8:40 a.m. The Japanese attacked the United States without warning.The Japanese traveled 3,400 miles across the pacific to execute their attack on Pearl Harbor.
Plans for a surprise attack against the United States were begun as early as January of 1941. The Japanese forces were led by Vice Admiral Chukchi Nagumo. The Japanese fleet consisted of 353 planes.
FDR declares war on Japan.
The Japanese specifically chose to attack on a Sunday because they believed Americans would be more relaxed and thus less alert on a weekend. Many U.S. servicemen were either still in their pajamas or eating breakfast in the mess halls when the attack on Pearl Harbor began. The United States aircraft carriers, the primary target of the attack, were not at the base at the time.