World War I is often referred to as "The War to End All Wars" due to the unprecedented scale of destruction, loss of life, and its global impact. The war lasted from 1914 to 1918 and involved many of the world's great powers, divided into two main alliances: the Allies and the Central Powers. The term suggested an idealistic hope that such a catastrophic event would prevent future wars by fostering peace and cooperation among nations. However, the harsh treaties and unresolved tensions following the war eventually contributed to World War II, demonstrating that conflicts can persist despite the lessons of previous wars.