World War II By pestockman Jun 28, 1914 Francis Ferdinand assassinated at Sarajevo Jul 5, 1914 Kaiser William II promised German support for Austria against Serbia Jul 28, 1914 Austria declared war on Serbia Aug 1, 1914 Germany declared war on Russia Aug 3, 1914 Germany declared war on France and invaded Belgium. Germany had to implement the Schlieffen Plan. Aug 4, 1914 Britain declared war on Germany Aug 26, 1914 Russian army defeated at Tannenburg and Masurian Lakes. Sep 6, 1914 Battle of the Marne started Oct 29, 1914 Turkey entered the war on Germany’s side. Trench warfare started to dominate the Western Front. Feb 19, 1915 Britain bombarded Turkish forts in the Dardanelles May 7, 1915 The “Lusitania” was sunk by a German U-boat May 23, 1915 Italy declared war on Germany and Austria Aug 5, 1915 The Germans captured Warsaw from the Russians Feb 21, 1916 Start of the Battle of Verdun Fought between France and Great Britain Apr 29, 1916 British forces surrendered to Turkish forces at Kut in Mesopotamia May 31, 1916 Battle of Jutland Naval war between Great Britain and Germany Jun 4, 1916 Start of the Brusilov Offensive Jul 1, 1916 Start of the Battle of the Somme Aug 10, 1916 End of the Brusilov Offensive Sep 15, 1916 First use en masse of tanks at the Somme Dec 7, 1916 Lloyd George becomes British Prime Minister Feb 1, 1917 Germany’s unrestricted submarine warfare campaign started Apr 6, 1917 USA declared war on Germany Apr 16, 1917 France launched an unsuccessful offensive on the Western Front Oct 24, 1917 Battle of Caporetto – the Italian Army was heavily defeated Nov 6, 1917 Britain launched a major offensive on the Western Front Dec 5, 1917 Armistice between Germany and Russia signed Jan 4, 1918 Peace conference met at Paris Mar 30, 1918 The Treaty of Brest-Litovsk was signed between Russia and Germany. Jun 28, 1918 The Treaty of Versailles was signed by the Germans. Jul 15, 1918 Second Battle of the Marne started. The start of the collapse of the German army Oct 29, 1918 Germany’s navy mutinied Oct 30, 1918 Turkey made peace Nov 3, 1918 Austria made peace Nov 11, 1918 Germany signed an armistice with the Allies – the official date of the end of World War One.