<Tr> <Td> <P> Empire of Japan </P> <Ul> <Li> Manchukuo (from 1932) </Li> </Ul> </Td> <Td> Republic of China </Td> </Tr> <P> Empire of Japan </P> <Ul> <Li> Manchukuo (from 1932) </Li> </Ul> <Li> Manchukuo (from 1932) </Li>

The japanese invasion of manchuria kicked off this war