World War I By bruh1234 Jun 28, 1914 Archduke Franz Ferdinand assassinated Aug 3, 1914 World War I begins May 7, 1915 The H.M.S. Lusitania is sunk by German U- Boats Sep 18, 1915 Germany limits submarine warfare Sep 15, 1916 Tanks are introduced Jan 15, 1917 Russian cease-fire declared Feb 1, 1917 Germany resumes unrestricted submarine warfare Feb 25, 1917 Zimmermann Telegram Apr 6, 1917 America enters the war Jan 8, 1918 Woodrow Wilson drafts the Fourteen Points Apr 21, 1918 The Red Baron is shot down Nov 11, 1918 World War I ends Jun 28, 1919 Treaty of Versailles signed
