The war’s fatality number was around 50 through 85 million according to wikipedia. That’s around 70% of the people involved. Although it is said to have been started in 1939, the Pacific had already been at war with China around 1935. World war 2 had become the war that had changed the globe socially and politically forever.
The countries involved in World War 2 eventually formed into 2 sides: the allies and the Axis. Countries on the allied power were the U.S,