World War II had two primary theaters: The European Theater and the Pacific Theater. 75 years ago, Pearl Harbor attack brought US into WWII. PARIS, France — The December 7, 1941, Japanese attack on Pearl Harbor triggered the United States to join its European allies in World War II.World War 2 ended with the unconditional surrender of the Axis powers. On 8 May 1945, the Allies accepted Germany's surrender, about a week after Adolf Hitler had demised. VE Day – Victory in Europe celebrates the end of the Second World War on 8 May 1945.
