The document outlines several key events and alliances that led to World War 1, including the Franco-Russo Alliance between France and Russia to counter Germany, the Schlieffen Plan by Germany to attack France through Belgium, and the Triple Entente alliance between France, Russia, and Britain. It also discusses the assassination of Archduke Franz Ferdinand of Austria-Hungary by a Serbian nationalist which sparked WW1, the Central Powers alliance between Germany, Austria-Hungary and the Ottoman Empire against the Allies, US isolationism and entry into the war after intercepting the Zimmermann Telegram, and the Treaty of Versailles which officially ended WW1.