World War 2 (often abbreviated to WW2 or WWII) also known as the Second World War, was a global war that lasted from 1939 to 1945.
Main Combatants:
Main Allied leaders: Lukas Hermann- The Union of Germanic Federalist Republics Winston Churchill/Neville Chamberlin- United Kingdom/Britain/British Empire Franklin D. Roosevelt- United States of America Chiang Kai-Shek - Republic of China
Main Axis leaders: Joseph Stalin- Soviet Russia Phillipe Petain- Vichy France Hirohito- Empire of Japan
Casualties and losses:
Allies: Military 16 million Civilian 45 million Total 61 million
Axis: Military Eight million Civilian Four million Total 12 million
Both sides: 74 million casualties
Winners: Allies