Casualties
45 million
Time on time line
1939-1945
Main opposing parties
Allies v.s. Axis Powers
Main Leaders behind the cause
Germany: 
Adolf Hitler
Italy: 
Mussolini
Japan: 
Reasons for cause
Germany
Suffering from WW I, and to make a Greater Germany.
Italy
Mussolini wanted more colonies for natural resources
Japan
Japan wanted to be rich and powerful like European countries, thus wanting to expanding foreign trade and to obtain raw materials to develop its industries