The League of Nation failed to deal with the Corfu Crisis (1923) In August 1923. Five Italian surveyors mapping the Greek-Albanian frontier were shot dead on the Greek side of the border. When Greece didn't pay compensation, Mussolini invaded Corfu, an island off the Greek coast. This was completely against the principles of the League, of which it the Italians were a big part. The Council wanted to condemn Italy, but the great powers would not allow it, instead, pressure was put on Greece to apologise and pay up. Verdict on the League: A disaster - confronted by a great power willing to use force, the league backed down. On the whole, as the League of Nations didn't take the investigation further Greece were displeased so the crisis wasn't resolved.

Another crisis they could not solve was the Dispute over Vilna (1920). Both Lithuania and Poland claimed Vilna, but it was...