The Causes of WWII are divided into separate categories such as long term and short term. One of the long term causes was the Treaty of Versailles.This was a cause because it placed restrictions on Germany and a financial ruin. Another cause of the war was The League of Nations. This was because The League of Nations was to promote world peace and ended up failing thus encouraging WWII. For the most part Hitlers actions was a main part of WWII. By taking over Germany Hitler caused many problems throughout his ruling. The causing of WWII was the failure of Appeasement. This was because not all countries joined the league, the league had no power and had no army. All these different reason were part of the causes of WWII.