Abyssinia Crisis
The Abyssinia Crisis, also known in Italy as the Walwal incident, was an international crisis in 1935 that originated in a dispute over the town of Walwal, which then turned into a conflict between Fascist Italy and the Ethiopian Empire. The League of Nations ruled against Italy and voted for economic sanctions, but they were never fully applied. Italy ignored the sanctions, quit the League and ultimately annexed and occupied Abyssinia after it had won the Second Italo-Ethiopian War. The crisis is generally regarded as having discredited the League.
Source: Wikipedia
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