The document summarizes the key causes and events of World War I. It discusses how nationalism, militarism, imperialism, and the alliance system contributed to rising tensions between European powers. The assassination of Archduke Franz Ferdinand provided the spark that led countries to take sides and enter the war. The U.S. eventually joined the Allies and helped ensure their victory through industrial production, military support, and fresh troops arriving in Europe. The Treaty of Versailles after the war was punitive towards Germany but rejected Woodrow Wilson's vision of a just peace through self-determination and the League of Nations.