GCSE Modern History/The Failure of the League

Why did the League of Nations fail?
There were a number of factors that led to the league failing, such as:
 * They had no troops, so its decisions were often not respected by countries as they knew there would be no consequences.
 * Decisions were slow, making it less effective.
 * Economic sanctions did not work, especially because countries such as the USA, USSR and Germany were missing.
 * The leading members often put their interests before those of the League, making it less effective.
 * The treaties it had to uphold were seen as unfair in many countries.
 * The Manchurian Crisis (1931-33) saw the League fail to deal with Japan invading Manchuria, undermining the League and showing how it was powerless to stop an attack similar to this one.
 * The Abyssinian Crisis in 1935 saw the League fail to deal with Italy invading Abyssinia, which was the final blow for the League and consequently destroyed its credibility.