Basically he was the leader of Germany from1932 to 1945 and the leader of the Nazi party which he make himself after world war 1. after Germany was defeated in world war 1.the allies decided to punish Germany.and Germany had no sources to do anything because they almost destroyed their economy. many Germans resented to humiliation.then Hitler formed a party called Nazis.who were intend on blaming all Germany problems. this party wanted the territory lost back and take over territories. and Hitler also declared that Jews are also responsible for war.the party did not get huge success and the party started looking for other party.but after that Nazis won. Hitler become prime minister. after the fire destroyed Germany parliament building Hitler persuaded the president to sign a law which gave him a dictatorial power. then he started rearming Germany because he declared Jews are responsible for war. then allied again declared war. then he gave his final solution to kill Jews and did so. it is estimated 6 million Jews were killed. and he also tried to kill anyone who opposed Nazis. but ultimately Nazis were defeated and Hitler committed suicide.