Statute of Westminister
The Statute of Westminister was an agreement saying that all British Dominions were independent from the crown.

The Manchurian crises
The Manchurian crises, triggered by an act of sabatoge that the Japanese army framed on the Chinese, was handed over to the League of Nations by China. Japan was seen as the agressor and the Lytton Commission was out into effect. The Lyton Commission, which concisted of weak economic sanctions, did very little to deter the Japanese and lead to them leaving the League of Nations. This whole affair highlighted the League of Nations' inability to effectively maintain peace.

The Purges
As Stalin's (the leader of communist Russia after Lenin died) power grew, so did his paranoia. He began ordering the deaths or deportations of anyone who was even slightly a threat.
Related: First Duma | Russian Revolution | Treaty of Brest-Litovsk, Russian Civil War | Commintern Established | New Economic Policy | First Five Year Plan | Second Five Year Plan

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