On December 7, 1941, Japan launches a surprise attack on American soil at Pearl Harbor.

On June 6, 1944, the Allies invade Western Europe in the largest amphibious attack in history.

In December 1944, a major German offensive is launched against the Allies in the Ardennes Mountains region on the Western Front.

On June 15, 1944, the U.S. launches a critical attack on Saipan in the Mariana Islands.