This was the name of the 1919 Peace Treaty that officially ended World War I. -
The Treaty of Versailles.
The name of the 1919 Peace Treaty that officially ended World War I is the Treaty of Versailles.
The name of the 1919 Peace Treaty that officially ended World War I is the Treaty of Versailles.
To find this answer, you can use a search engine such as Google. Simply type in "Peace Treaty that ended World War I" and the search engine will likely provide you with the answer. Additionally, you could refer to history books or online resources that discuss the aftermath of World War I and the treaties that were signed to bring it to an end.