The surprise attack on Pearl Harbor Naval Base in Hawaii happened on December 7, 1941, when the Japanese military forces attacked the United States. Japan and the United States were having difficulties for a decade before the attack. Japan was invading China and the United States protested it.

The objective of the attack on Pearl Harbor was to immobilize the Pacific Fleet so the United States couldn't intervene with the invasion Japan planned with the Germans on China.

The attack at Pearl Harbor killed 2,308 and wounded about 2,000. One of the ships that was destroyed was the U.S.S. Arizona. The attack was great, but was not a total success.

The attack on Pearl Harbor brought America into World War II.