Why was the League of Nations a failure?

The main reasons why the League of Nations failed overall:

• French and British self interest wouldn't abandon these to support league.
• Absent powers include USA and Russia. Lacked authority and sanctions inefficient.
• Inefficient sanctions. Sanctions were meant to be the League's biggest weapon but without USA they didn't work. Broken easily
• Lack of armed forces. The League of Nations had no armed forces of its own. Britain and France never fought for the league
• Unfair treaties.
• Too harsh so the league had trouble imposing them
• Reached decisions too slowly.
• Sanctions didn't work because they were too slow. Met too infrequently.