The cause and effect are the following: CAUSE: The Treaty of Versailles ended the World War I, causing resentment and economic hardship in Germany; EFFECT: World War II began.
In the Treaty of Versailles Germany was obliged to fulfill with certain number of requirements since it was one of the loser countries of World War II. These requirements implied that Germany payed for most the European restauration, leading on different economical problems. Little by little, a disagreement feeling grew in German society, turning them to fascist and nationalist positions that were the World War II roots.