The year that marked the end of World War I was 1918. The war concluded on November 11, 1918, at 11 a.m. when an armistice agreement was signed between the Allied Powers and Germany. This ceased the hostilities on the Western Front, effectively ending four years of brutal conflict that had lasting effects on Europe and the world. The conclusion of World War I led to significant political, economic, and social changes, including the dismantling of empires and the creation of new nations, as well as setting the stage for World War II due to unresolved tensions and harsh treaties.