Franklin Deleno Roosevelt - Germany - History - Japan - Warner Todd Huston - WWII Dec. 7, 1941, Japanese ‘Sneak Attack’ On Pearl Harbor ‘Will Live in Infamy’ December 7, 2011 by Warner Todd Huston On Dec. 9th, 1941, the Japanese launched a sneak attack on our forces at Pearl Harbor, Hawaii. As a result, America formally joined the war against the Axis powers. 2,402 American servicemen were killed and 1,282 were wounded. In memory of them.