What was the name of the international organization established for peacekeeping after World War I?

The League of Nations was the international organization established after World War I with the primary goal of promoting peace and cooperation among countries to prevent future conflicts. Created in 1920 as part of the Treaty of Versailles, it sought to provide a platform for dialogue and mediation, thereby fostering diplomatic relations and collective security.

The League aimed to address issues such as disarmament, territorial disputes, and global health initiatives, laying the groundwork for future international organizations. Although it ultimately faced challenges in enforcing its resolutions and preventing aggression, the League of Nations is significant as it was a pioneering effort to create a structured approach to international governance aimed at maintaining peace.

The other options represent different organizations established for various purposes in different historical contexts. The United Nations, formed after World War II, built upon the ideas of the League of Nations. The Commonwealth of Nations is a political association of mostly former territories of the British Empire. NATO, or the North Atlantic Treaty Organization, is a military alliance established for collective defense in the 20th century. Each of these organizations emerged from different circumstances and with different objectives than those of the League of Nations.