What were the major diplomatic efforts to prevent war before World War II?

The major diplomatic efforts to prevent war before World War II included the following:

1. Treaty of Versailles: The Treaty of Versailles, signed in 1919, aimed to establish peace and prevent future conflicts by imposing severe penalties on Germany and its allies, holding them responsible for the war.

2. League of Nations: The League of Nations was established in 1920 as an international organization to promote peace and resolve conflicts through diplomacy. It aimed to prevent future wars by encouraging disarmament, collective security, and peaceful negotiations.

3. Kellogg-Briand Pact: Signed in 1928, the Kellogg-Briand Pact was an international agreement between 62 nations to renounce war as an instrument of national policy. It aimed to promote peaceful resolutions to conflicts through diplomacy and arbitration.

4. Appeasement Policy: In the 1930s, some countries, particularly Britain and France, pursued a policy of appeasement towards aggressive nations like Nazi Germany. They hoped that by giving in to certain demands, they could avoid war and maintain peace.

5. Non-Aggression Pacts: Several non-aggression pacts were signed before World War II, such as the Molotov-Ribbentrop Pact between Germany and the Soviet Union in 1939. These agreements aimed to prevent conflicts between nations by pledging not to attack each other.

Despite these diplomatic efforts, tensions continued to rise, and ultimately, they were unable to prevent the outbreak of World War II in 1939.