There were lots of World War Two Leaders. Winston Churchill was the leader of Great Britain at the time of World War Two.
Lots of Leaders in The World War were very powerful like Hitler and Starlin were extremely powerful leaders. If the Germans kept on bombing and attacking England, they would've won the World War. After the war with England and Germany, Germany started to surround Russia, which was a very big mistake. After Germans started to bomb Russia, Russians did not like it. So they started bombing and surrounding Germany. After that Hitler knew that he would get killed, so he killed himself anyway.