World War I officially ended on November 11, 1918. This date marks the armistice signed between the Allies and Germany, effectively ceasing hostilities on the Western Front. The Treaty of Versailles, signed in 1919, formalized the peace and set the terms for Germany's reparations and territorial losses. The end of the war significantly reshaped international relations and led to the establishment of new nations and the League of Nations, aiming to prevent further conflicts. The war's conclusion was a turning point that impacted global politics, economics, and society well into the 20th century.