Explanation:
The League of Nations, established after World War I with the aim of maintaining peace and preventing future conflicts, failed to prevent the outbreak of the Second World War. The League lacked the authority and military power to enforce its decisions and relied on collective security, which proved ineffective. Several major powers, including the United States, did not join the League, weakening its ability to act decisively. Additionally, the League failed to prevent the aggressive actions of fascist powers, such as Italy's invasion of Ethiopia and Germany's remilitarization of the Rhineland. The League's inability to curb these acts of aggression led to the erosion of international trust in its ability to maintain peace, directly contributing to the outbreak of World War II.