Why didn't the league of nations stop hitler or mussolini

For in a first moment we realized that the decision to create the League of Nations would be beneficial, and that the success of such a body would be helpful if the ills experienced in the First War were not to happen again. In theory, therefore, in practice, the League of Nations did not reflect in any way the political situation experienced in those times. After all, other agreements from the same time served to sharpen the differences between those who won and those who lost in the Great War.

The greatest proof of this body's failure was the very rise of totalitarian regimes on the European continent. Skeptical of the benefits of liberalism and democracy, such nations believed that the humiliations experienced after World War I would only be healed by strengthening their military forces and conquering new territories. In fact, behind this expansionist discourse, the revenge against the winners of the First World War was covered.