What treaty officially ended World War I?

The Treaty of Versailles officially ended World War I, signing on June 28, 1919. This treaty was significant because it formally concluded the state of war between most of the Allied Powers and Germany, outlining the terms of the peace settlement after the war's vast destruction and loss of life.

The treaty imposed heavy reparations and territorial losses on Germany, which sparked various political, economic, and social changes in the country and had lasting implications for European politics. Its creation involved extensive negotiations and was a critical moment in history that shaped international relations and helped set the stage for World War II.

In contrast, the other treaties listed served different purposes: the Treaty of Trianon dealt with Hungary's post-war boundaries, the Treaty of Brest-Litovsk was a peace treaty between the Central Powers and Soviet Russia, and the Treaty of Paris refers to several treaties but is not the one that concluded World War I specifically. Thus, the Treaty of Versailles stands out as the significant agreement that ended World War I.