What treaty was responsible for the creation of the intergovernmental organization that would eventually be replaced by the UN?
Treaty of Versailles.
The Treaty of Versailles (French: Traité de Versailles) was the most important of the peace treaties that brought World War I to an end. The Treaty ended the state of war between Germany and the Allied Powers. It was signed on 28 June 1919, exactly five years after the assassination of Archduke Franz Ferdinand.