How did European nations try to prevent world war 2?

European nations attempted to prevent World War II through a series of diplomatic efforts and agreements aimed at maintaining peace. Notably, the Treaty of Versailles was revised in hopes of addressing German grievances, while the League of Nations was established to promote collective security and resolve disputes. Additionally, some countries, like Britain and France, adopted a policy of appeasement toward aggressive powers, particularly Nazi Germany, believing that satisfying certain demands could avert conflict. However, these measures ultimately failed to contain the expansionist ambitions of Axis powers.