Why did the manchurian crisis weaken the league of nations?

The Manchurian Crisis of 1931 significantly weakened the League of Nations by exposing its inability to enforce collective security and resolve international conflicts effectively. When Japan invaded Manchuria, the League's response was slow and ultimately ineffective, leading to Japan's withdrawal from the organization. This failure undermined the League's credibility and authority, demonstrating that it could not prevent aggression by powerful nations, which contributed to the rise of militarism and tensions leading up to World War II.