Answer:
Causes of World War II :
1 The Failure of Peace Efforts.
2 The Rise of Fascism.
3 Formation of the Axis Coalition.
4 German Aggression in Europe.
5 The Worldwide Great Depression.
6 Mukden Incident and the Invasion of Manchuria (1931).
7 Japan invades China (1937).
8 Pearl Harbor and Simultaneous Invasions (early December 1941)