Why could not the treaty with Turkey be put into practice?

Why is it said that the Treaty of Versailles led to the Second World War?

With reference to the causes of the First World War, explain the following :

(a) Armament race

(b) militant nationalism

With reference to the Treaty of Versailles, explain the following :

(a) Consequences of the First World War on Germany.

(b) Consequences of the First World War on Austria-Hungary.