World War I Timeline By ericadancer03 Jul 28, 1914 Austria declared war on Serbia. Austria declared war on Serbia. Aug 1, 1914 Austria declared war on Russia Aug 3, 1914 Germany declared war on France and invaded Belgium Aug 4, 1914 Britain declared war on Germany Aug 26, 1914 Russian army defeated Tannenburg Oct 18, 1914 First battle of Ypres Oct 29, 1914 Turkey entered war on Germany’s side May 23, 1915 Italy declared war on Germany and Austria Dec 19, 1915 Allies evacuated Gallipoli Jan 27, 1916 Conscription introduced in Britain Dec 7, 1916 Lloyd George becomes British Prime Minister Apr 6, 1917 USA declared war on Germany Jul 31, 1917 Start of the Third Battle of Ypres Oct 24, 1917 Italian army heavily deveated Nov 20, 1917 British tanks won victory on Cambrai Mar 3, 1918 Treaty of Brest Litovask was signed Mar 21, 1918 Germany broke through Somme Apr 9, 1918 Germany started an offensive in Flanders Jul 15, 1918 Start of collapse of German army Oct 30, 1918 Turkey made peace Nov 9, 1918 Austria made peace Nov 11, 1918 Official date end of World War 1
