The USS Arizona Memorial, located at Pearl Harbor in Honolulu, Hawaii, marks the resting place of 1,102 of the 1,177 sailors and Marines killed on USS Arizona (BB-39) during the Japanese surprise attack on Pearl Harbor on 7 December 1941 and commemorates the events of that day. The attack on Pearl Harbor and the island of Oʻahu was the action that led to the United States' direct involvement in World War II.