World War 1 By caarlibell Jun 28, 1914 Assassination of Franz Ferdinand Jul 28, 1914 Start of World War 1 Dec 2, 1914 Trench Warfare Apr 22, 1915 Second Battle of Ypres Jul 1, 1916 Battle of Somme Apr 9, 1917 Battle of Vimy Ridge Nov 11, 1918 End of World War 1 Jan 10, 1919 Paris Peace Conference Jun 28, 1919 Treaty of Versailles Jan 10, 1920 Leagueof Nations