<Tr> <Th_colspan="2"> Commanders and leaders </Th> </Tr> <Tr> <Td> Main Allied leaders <Ul> <Li> Joseph Stalin </Li> <Li> Franklin D. Roosevelt </Li> <Li> Winston Churchill </Li> <Li> Chiang Kai - shek </Li> </Ul> </Td> <Td> Main Axis leaders <Ul> <Li> Adolf Hitler </Li> <Li> Hirohito </Li> <Li> Benito Mussolini </Li> </Ul> </Td> </Tr> <Ul> <Li> Joseph Stalin </Li> <Li> Franklin D. Roosevelt </Li> <Li> Winston Churchill </Li> <Li> Chiang Kai - shek </Li> </Ul> <Li> Franklin D. Roosevelt </Li>

When did ww2 start and end for america