The First World War (1914-1918) By Gacemala5 1914 The Ottoman Empire joins the Central Powers 1914 Germany implements the Schlieffen Plan and attacks France 1914 'Trench warfare' begins Jun 28, 1914 Assassination of the Archduke Franz Ferdinand in Sarajevo Aug 23, 1914 Japan adheres to the Triple Entente 1915 The Germans use toxic gases for the first time in Ypres 1915 Italy joins the Triple Entente (Treaty of London) 1915 Bulgaria enters the war with the Central Powers 1916 The Battle of Verdun begins 1916 Allied offensive at Somme From July to October 1917 Germany begins the submarine war 1917 The united States enters the war 1917 Russia signs the armistice with the Central Powers 1918 Wilson pronounces the speech on the 'Fourteen Points' 1918 Russia signs the Treaty of Brest-Litvosk 1918 Allied counter-offensive on the Western front Nov 11, 1918 Germany signs the armistice. The war is over
