American View of World War II

I hate to make this seem like a chatroom with my response, but I figured what the hell. Anyway, the United States of America did not participate in World War II until after Pearl Harbor in the near-end of 1941. By 1942, the United States of America had been involved in absolute full-blown war, along with the UK, France, the Soviet Union, Italy, Imperial Japan, and Nazi Germany. HOWEVER, it is a fact that America had wanted to seclude itself from World War II. After World War I, America did not want to participate in anymore international wars. However, after Japan attacked Pearl Harbor, America had to drag itself with all its military-industrial power. America got roughly 3 years of battle in during WWII, from '42-'45. On June 6th, 1944, in cooperation with the UK and other willing allies, America launched Operation Overlord (aka : D-Day), in an ultra-daring attempt to reclaim France, ultimately to reclaim Europe from facist & nazi grip. Then, in the middle of 1945, America began top-secret experimentation via a letter from a man named Albert Einstein, concerning a way to "split the atom". This was called The Manhattan Project, and it was the experimentation of a revolutionary new bomb, called an "atomic bomb" (sidenote : the atomic bomb was originally planned out by Axis powers like Germany and Japan). After August 6th and 9th of the same year, a new age was born..... World War II ended on September 2nd of 1945 when Japan, the last enemy, surrendered. After World War II, it was realized worldwide that the United States of America was clearly the world's most powerful nation, although along with the Soviet Union (these two would rival one-another during the Cold War, which would occur next year). It was also realized that the originally-fledgling nation of the United States of America had a major purpose, which would be to assume major leadership of the world (not absolute leadership, nor even rulership, given America's purpose and beliefs.....today, America believes that the world belongs to everyone). Although America only got roughly 3 years of fighting in during WWII, America was said to do most of the work.