On the morning of December 7, 1941, the Imperial Japanese Navy launched a surprise military strike against the United States naval base at Pearl Harbor, Hawaii Territory. The attack was intended to prevent the U.S. Pacific Fleet from interfering with Japanese military actions in Southeast Asia. The strike resulted in the deaths of over 2,400 Americans and the destruction of numerous battleships and aircraft. The following day, President Franklin D. Roosevelt famously declared the date would 'live in infamy' and the U.S. officially entered World War II. This event instantly unified a previously isolationist American public and shifted the tide of the war by bringing the industrial might and manpower of the United States to the side of the Allies. It also led to the tragic and controversial internment of over 110,000 Japanese-Americans in the continental U.S.