What historic incidents leading to World War 2 prompted the inscription on the league of nations tombstone?

The inscription on the League of Nations' tombstone reflects its failure to prevent World War II, which stemmed from a series of historic incidents including the rise of totalitarian regimes in Germany, Italy, and Japan, and their aggressive expansionist policies. The League's inability to enforce its resolutions, particularly during the 1930s when it failed to address Japan's invasion of Manchuria and Italy's invasion of Ethiopia, highlighted its weaknesses. Additionally, the policy of appeasement towards Hitler allowed the Nazi regime to grow unchecked, ultimately culminating in the outbreak of the war in 1939. These failures underscored the League's impotence and contributed to its dissolution after the war.