Remembering December 7, 1941
"Yesterday, December 7, 1941 ? a date which will live in infamy ? the United States of America was suddenly and deliberately attacked by naval and air forces of the Empire of Japan." President Franklin D. Roosevelt so began his address to Congress the day after the attack.

Later that day Congress declared a state of war between the U.S. and the Imperial Government of Japan. Three days later Congress approved similar declarations of war against Germany and Italy. American had entered World War II.
 

USS ARIZONA MEMORIAL

The Arizona December 7,1941

Comic Strip of December 7,1941

The Attack on Pearl Harbor was a surprise aerial attack largely on Pearl Harbor, Oahu, Hawaii, and the USA launched by the 1st Air Fleet of the Imperial Japanese Navy of the task force Carrier Striking Task Force [1] on the morning of Sunday, December 7, 1941 (Hawaii time). It was aimed at the Pacific Fleet of the United States Navy and its defending Army Air Corps and Marine defensive squadrons as preemptive war intended to neutralize the American forces in the Pacific in an impending World War II. Pearl Harbor was actually only one of several military and naval installations which were attacked, including those on the other side of the island.

http://www.historyplace.com/worldwar2/timeline/pearl.htm