World War I officially ended on November 11, 1918, with the signing of the Armistice of Compiègne. This agreement marked the cessation of hostilities on the Western Front, effectively bringing an end to four years of brutal conflict that had reshaped global politics. The war, which involved many of the world's great powers, resulted in significant loss of life and led to profound social, economic, and political changes across Europe and beyond. The post-war period gave rise to various treaties, notably the Treaty of Versailles in 1919, which aimed to address the aftermath of the war and reshape national boundaries.