The document summarizes America's entry into WWII from isolationism to involvement. It discusses how the U.S. initially wanted to remain isolated from the war but became increasingly involved through acts like cash and carry and lend lease. The bombing of Pearl Harbor by Japan in 1941 prompted the U.S. to declare war. The U.S. mobilized for war through efforts like enlistment, increased production, and utilization of women in the workforce. The document then outlines some significant battles of WWII and how the world changed as a result of the Allied victory.