World War 1 before United States Involvment By mshawn233 Jun 28, 1914 Francis Ferdinand is assassinated in Sarajevo Period: Jun 28, 1914 to Apr 6, 1917 World War 1 before United States Involvment Jul 23, 1914 Austria-Hungary writes a note to Serbia Jul 29, 1914 Autria-Hungary declares war on Serbia Aug 1, 1914 Germany delcares war on Russia Aug 2, 1914 Germany gives an ultimatum to Belgium Aug 3, 1914 Germany declares war on France Aug 4, 1914 Great Britain declares war on Germany Aug 10, 1914 France declares war on Austria-Hungary Aug 12, 1914 Great Britain declares war on Austria-Hungary Aug 16, 1914 The British Army lands in France Aug 16, 1914 Russia advances into East prussia Aug 23, 1914 Japan declares war on Germany Sep 6, 1914 The First Battle of the Marne begins. The Western Front is formed. Nov 5, 1914 Great Britain declares war on the Ottoman Empire Feb 18, 1915 England issues a blockade of U-boats Apr 22, 1915 Second Battle of Ypres begins. The Germans use gas for the first time. May 7, 1915 The cruise ship the Lusitania is sunk by German U-boats. 128 Americans die from the sinking of the ship. May 23, 1915 Italy declares war on Austria-Hungary Aug 21, 1915 Cotton delcared a contraband Aug 25, 1915 Brest-Litovsk falls Oct 6, 1915 Austria-Hungary and German forces invade Serbia Oct 14, 1915 Bulgaria declares war on Serbia Feb 21, 1916 The Battle of Verdun begins May 31, 1916 The Battle of Jutland begins Sep 15, 1916 The British use the first tanks in the Battle of the Somme Oct 10, 1916 The Allies give an ultimatum to Greece. Dec 12, 1916 The Germans release peace proposals Dec 15, 1916 French forces win the Battle of Verdun Feb 3, 1917 Germany announces it will be starting unrestricted U-boat warfare Mar 12, 1917 A revolution begins in Russia Mar 15, 1917 Czar Alezander II is abdicated in Russia Apr 6, 1917 The United States declares war on Germany