Input: Relationship: 'invade', Argument/Subject 1: 'japan', Argument/Subject 2: 'manchurium'

Answer: In 1931 when Japan Invaded Manchuria , the invasion was a success but the most important factor that came out of the entire incident was the weak response from the league of nations towards Japan 's aggression this showed to Hitler and Mussolini that the Leagues power and word was not worth the paper it was written on .