when did japan leave the league of nations
League of Nations The League of Nations sent observers. The Lytton Report appeared a year later (October 1932). It declared Japan to be the aggressor and demanded Manchuria be returned to China. The report passed 42â€“1 in the Assembly in 1933 (only Japan voting against), but instead of removing its troops from China, Japan withdrew from the League.[155] In the end, as British historian Charles Mowat argues, collective security was dead: