Why did many nations in south asia and southeast asia win independence after 1945

Decolonization The Japaneses had a good bit of land during ww2 but when the united states won the pacific war and drooped the atomic bomb witch led to the surrender of japan in September 2,1945 and liberated some of Asia. Germany concord much of Asia but he lost and puppet country's became independent. 

He made the polygraph too,but thomas edison was not falsely credited for the light buld