League of Nations successes and failures

How successful was the League of Nations? Revision video (two halves) looking at its successes and failures (first half) and what caused the LON to fail to stop the start of WW2 (Second half - from around 15 mins).
Bibliography/References:
Conflict and Tension: The inter war years 1918-1939by Longley, Wilkes and Cloake (Oxford, 2016) & accompanying revision book by Longley and Wilkes are highly recommended for revision!
This project was created with Explain Everything™ Interactive Whiteboard for iPad.