<P> 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 42 -- 1 in the Assembly in 1933 ( only Japan voting against ) , but instead of removing its troops from China , Japan withdrew from the League . In the end , as British historian Charles Mowat argues , collective security was dead : </P>
<P> 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 42 -- 1 in the Assembly in 1933 ( only Japan voting against ) , but instead of removing its troops from China , Japan withdrew from the League . In the end , as British historian Charles Mowat argues , collective security was dead : </P>
when did japan leave the league of nations
when did japan leave the league of nations
1933
1933