What is the timeline of war world two?

World War Two started in 1939 when Adolf Hitler began taking over countries. World War Two ended in 1945 after the United States dropped two atomic bombs on Hiroshima and Nagasaki, in Japan. Interestingly, there wasn't an "official" end to World War Two until 1990, when a certain document was signed that officially concluded the hostilities between the countries that fought in World War Two. This is because when Japan unconditionally surrendered, "ending" the war, no treaty was signed that officially ended the war. The countries simply stopped fighting.