1. The Treaty of Versailles (1919): After World War I, the Treaty of Versailles was designed to weaken Germany and prevent it from starting another war. The treaty included several provisions, such as reducing the size of the German military, requiring Germany to pay reparations, and ceding territory to other countries.
2. The Locarno Treaties (1925): The Locarno Treaties were a series of agreements between Germany, France, Belgium, Great Britain, and Italy. The treaties guaranteed the borders of Germany and Belgium, and Germany agreed to renounce its claims to Alsace-Lorraine, which had been ceded to France after World War I.
3. The Kellogg-Briand Pact (1928): The Kellogg-Briand Pact was an international treaty that outlawed war as a means of settling disputes between countries. The pact was signed by most of the world's countries, including Germany.
4. The Munich Agreement (1938): The Munich Agreement was an agreement between Germany, Great Britain, France, and Italy that allowed Germany to annex the Sudetenland region of Czechoslovakia. The agreement was widely criticized as a appeasement of Hitler and his aggressive policies.
5. The Non-Aggression Pact (1939): The Non-Aggression Pact was a treaty between Germany and the Soviet Union that pledged the two countries to not attack each other. The pact was a surprise to many, as the two countries had been ideological enemies for many years.
Despite these efforts, Germany was able to successfully launch its invasion of Poland on September 1, 1939, which marked the beginning of World War II.