Question

Who was participating in second world war and who win?

Answer 1

Germany played a key role in the events that led to Second World War.  The seeds of the second world war were sown in the treaty of Versailles because Hitler's goal to unite Germans as a single Aryan group would only be initiated by breaking the treaty. Further, having broken the Treaty of Versailles once, Hitler risked doing it a second time by marching 30,000 troops into Cologne on7thMarch 1936. France, with 250,000 troops mobilized, remained passive because Britain would not support her. Britain took the view that Germany was marching into her own back yard.
 

Answer 2

The participants were the Allied and Axis  countries.
Germany won the second world war.