During Abyssinia Crisis in the 1930s, the League of Nations failed to stop aggressive countries from gaining power.
The Abyssinia Crisis was a conflict that took place in 1935, between the Kingdom of Italy and the Empire of Ethiopia, also known as "Abyssinia".
The League of Nations was an intergovernmental organization created after World War I, with the mission to maintain World Peace.
The League of Nations ruled against Italy, and voted for economic sanctions that were not applied. Italy ignored the sanctions, dropped out of the league, and made deals with other nations in order to take control over Ethiopia. This crisis was a big hit taken by the league, which made Italy closer to an alliance with Nazi Germany.