<Table> <Tr> <Th> Dates </Th> <Th> Events </Th> <Th> </Th> </Tr> <Tr> <Td> June 28 </Td> <Td> Assassination of Archduke Franz Ferdinand of Austria , heir to the Austro - Hungarian throne , who was killed in Sarajevo along with his wife Duchess Sophie by Bosnian Serb Gavrilo Princip . </Td> <Td> Details </Td> </Tr> <Tr> <Td> July 5 </Td> <Td> Austria - Hungary seeks German support for a war against Serbia in case of Russian militarism . Germany gives assurances of support . </Td> <Td> </Td> </Tr> <Tr> <Td> July 23 </Td> <Td> Beginning of the `` Black Week '' . Austria - Hungary sends an ultimatum to Serbia . The Serbian response is seen as satisfactory everywhere but in Vienna . </Td> <Td> Details </Td> </Tr> <Tr> <Td> July 28 </Td> <Td> Austria - Hungary declares war on Serbia . Russia mobilizes . </Td> <Td> Details </Td> </Tr> <Tr> <Td> The Netherlands declare neutrality . </Td> <Td> </Td> </Tr> <Tr> <Td> July 29 </Td> <Td> Kaiser Wilhelm II of Germany and Czar Nicholas II of Russia communicate via telegram . </Td> <Td> </Td> </Tr> <Tr> <Td> July 30 </Td> <Td> Germany sends Russia an ultimatum . </Td> <Td> </Td> </Tr> <Tr> <Td> August 1 </Td> <Td> Germany declares war on Russia and mobilizes . </Td> <Td> </Td> </Tr> <Tr> <Td> France mobilizes . </Td> <Td> </Td> </Tr> <Tr> <Td> Italy declares its neutrality . </Td> <Td> </Td> </Tr> <Tr> <Td> Denmark , Sweden and Norway unitedly declare their neutrality . </Td> <Td> </Td> </Tr> <Tr> <Td> Germany and the Ottoman Empire sign a secret alliance treaty . </Td> <Td> Details </Td> </Tr> <Tr> <Td> August 2 </Td> <Td> Germany invades Luxembourg . </Td> <Td> Details </Td> </Tr> <Tr> <Td> Skirmish at Joncherey , first military action on the Western Front . </Td> <Td> </Td> </Tr> <Tr> <Td> August 2 -- 26 </Td> <Td> Germany besieges and captures fortified Longwy `` the iron gate to Paris '' near the Luxembourg border , opening France to mass German invasion . </Td> <Td> </Td> </Tr> <Tr> <Td> August 3 </Td> <Td> Germany declares war on France . Belgium denies permission for German forces to pass through to the French border . </Td> <Td> </Td> </Tr> <Tr> <Td> Switzerland declares its neutrality and mobilizes for purposes of defense . </Td> <Td> </Td> </Tr> <Tr> <Td> August 4 </Td> <Td> Germany invades Belgium to outflank the French army . </Td> <Td> Details </Td> </Tr> <Tr> <Td> Britain protests the violation of Belgian neutrality , guaranteed by the Treaty of London , The German Chancellor replies that the treaty is just a scrap of paper . The United Kingdom declares war on Germany . </Td> <Td> Details </Td> </Tr> <Tr> <Td> The United States declares neutrality . </Td> <Td> </Td> </Tr> <Tr> <Td> August 4 -- 16 </Td> <Td> The Germans besiege and then capture the fortresses of Liège , Belgium . </Td> <Td> Details </Td> </Tr> <Tr> <Td> August 5 </Td> <Td> German Steamer SS Pfalz surrenders after being fired on by Fort Nepean , south of Melbourne , Australia </Td> <Td> </Td> </Tr> <Tr> <Td> Montenegro declares war on Austria - Hungary . </Td> <Td> </Td> </Tr> <Tr> <Td> The Ottoman Empire closes the Dardanelles . </Td> <Td> </Td> </Tr> <Tr> <Td> August 6 </Td> <Td> Austria - Hungary declares war on Russia . </Td> <Td> </Td> </Tr> <Tr> <Td> Serbia declares war on Germany . </Td> <Td> </Td> </Tr> <Tr> <Td> August 7 </Td> <Td> The British Expeditionary Force arrives in France . </Td> <Td> Details </Td> </Tr> <Tr> <Td> Spain declares `` the strictest neutrality . '' </Td> <Td> Details </Td> </Tr> <Tr> <Td> August 7 -- September 13 </Td> <Td> Battle of the Frontiers . The Germans obtain a victory against the British Expeditionary Force and France 's Fifth Army . </Td> <Td> </Td> </Tr> <Tr> <Td> August 7 -- 10 </Td> <Td> Battle of Mulhouse , a phase of the Battle of the Frontiers . </Td> <Td> </Td> </Tr> <Tr> <Td> August 8 </Td> <Td> Montenegro declares war on Germany . </Td> <Td> </Td> </Tr> <Tr> <Td> August 9 </Td> <Td> The Togoland Campaign begins . </Td> <Td> </Td> </Tr> <Tr> <Td> August 11 </Td> <Td> France declares war on Austria - Hungary . </Td> <Td> </Td> </Tr> <Tr> <Td> August 12 </Td> <Td> The United Kingdom declares war on Austria - Hungary . </Td> <Td> </Td> </Tr> <Tr> <Td> Battle of Halen , a phase of the Battle of the Frontiers . </Td> <Td> </Td> </Tr> <Tr> <Td> August 14 -- 25 </Td> <Td> Battle of Lorraine , a phase of the Battle of the Frontiers . </Td> <Td> </Td> </Tr> <Tr> <Td> August 16 -- 20 </Td> <Td> The Serbs defeat the Austro - Hungarians at
<Table> <Tr> <Th> Dates </Th> <Th> Events </Th> <Th> </Th> </Tr> <Tr> <Td> June 28 </Td> <Td> Assassination of Archduke Franz Ferdinand of Austria , heir to the Austro - Hungarian throne , who was killed in Sarajevo along with his wife Duchess Sophie by Bosnian Serb Gavrilo Princip . </Td> <Td> Details </Td> </Tr> <Tr> <Td> July 5 </Td> <Td> Austria - Hungary seeks German support for a war against Serbia in case of Russian militarism . Germany gives assurances of support . </Td> <Td> </Td> </Tr> <Tr> <Td> July 23 </Td> <Td> Beginning of the `` Black Week '' . Austria - Hungary sends an ultimatum to Serbia . The Serbian response is seen as satisfactory everywhere but in Vienna . </Td> <Td> Details </Td> </Tr> <Tr> <Td> July 28 </Td> <Td> Austria - Hungary declares war on Serbia . Russia mobilizes . </Td> <Td> Details </Td> </Tr> <Tr> <Td> The Netherlands declare neutrality . </Td> <Td> </Td> </Tr> <Tr> <Td> July 29 </Td> <Td> Kaiser Wilhelm II of Germany and Czar Nicholas II of Russia communicate via telegram . </Td> <Td> </Td> </Tr> <Tr> <Td> July 30 </Td> <Td> Germany sends Russia an ultimatum . </Td> <Td> </Td> </Tr> <Tr> <Td> August 1 </Td> <Td> Germany declares war on Russia and mobilizes . </Td> <Td> </Td> </Tr> <Tr> <Td> France mobilizes . </Td> <Td> </Td> </Tr> <Tr> <Td> Italy declares its neutrality . </Td> <Td> </Td> </Tr> <Tr> <Td> Denmark , Sweden and Norway unitedly declare their neutrality . </Td> <Td> </Td> </Tr> <Tr> <Td> Germany and the Ottoman Empire sign a secret alliance treaty . </Td> <Td> Details </Td> </Tr> <Tr> <Td> August 2 </Td> <Td> Germany invades Luxembourg . </Td> <Td> Details </Td> </Tr> <Tr> <Td> Skirmish at Joncherey , first military action on the Western Front . </Td> <Td> </Td> </Tr> <Tr> <Td> August 2 -- 26 </Td> <Td> Germany besieges and captures fortified Longwy `` the iron gate to Paris '' near the Luxembourg border , opening France to mass German invasion . </Td> <Td> </Td> </Tr> <Tr> <Td> August 3 </Td> <Td> Germany declares war on France . Belgium denies permission for German forces to pass through to the French border . </Td> <Td> </Td> </Tr> <Tr> <Td> Switzerland declares its neutrality and mobilizes for purposes of defense . </Td> <Td> </Td> </Tr> <Tr> <Td> August 4 </Td> <Td> Germany invades Belgium to outflank the French army . </Td> <Td> Details </Td> </Tr> <Tr> <Td> Britain protests the violation of Belgian neutrality , guaranteed by the Treaty of London , The German Chancellor replies that the treaty is just a scrap of paper . The United Kingdom declares war on Germany . </Td> <Td> Details </Td> </Tr> <Tr> <Td> The United States declares neutrality . </Td> <Td> </Td> </Tr> <Tr> <Td> August 4 -- 16 </Td> <Td> The Germans besiege and then capture the fortresses of Liège , Belgium . </Td> <Td> Details </Td> </Tr> <Tr> <Td> August 5 </Td> <Td> German Steamer SS Pfalz surrenders after being fired on by Fort Nepean , south of Melbourne , Australia </Td> <Td> </Td> </Tr> <Tr> <Td> Montenegro declares war on Austria - Hungary . </Td> <Td> </Td> </Tr> <Tr> <Td> The Ottoman Empire closes the Dardanelles . </Td> <Td> </Td> </Tr> <Tr> <Td> August 6 </Td> <Td> Austria - Hungary declares war on Russia . </Td> <Td> </Td> </Tr> <Tr> <Td> Serbia declares war on Germany . </Td> <Td> </Td> </Tr> <Tr> <Td> August 7 </Td> <Td> The British Expeditionary Force arrives in France . </Td> <Td> Details </Td> </Tr> <Tr> <Td> Spain declares `` the strictest neutrality . '' </Td> <Td> Details </Td> </Tr> <Tr> <Td> August 7 -- September 13 </Td> <Td> Battle of the Frontiers . The Germans obtain a victory against the British Expeditionary Force and France 's Fifth Army . </Td> <Td> </Td> </Tr> <Tr> <Td> August 7 -- 10 </Td> <Td> Battle of Mulhouse , a phase of the Battle of the Frontiers . </Td> <Td> </Td> </Tr> <Tr> <Td> August 8 </Td> <Td> Montenegro declares war on Germany . </Td> <Td> </Td> </Tr> <Tr> <Td> August 9 </Td> <Td> The Togoland Campaign begins . </Td> <Td> </Td> </Tr> <Tr> <Td> August 11 </Td> <Td> France declares war on Austria - Hungary . </Td> <Td> </Td> </Tr> <Tr> <Td> August 12 </Td> <Td> The United Kingdom declares war on Austria - Hungary . </Td> <Td> </Td> </Tr> <Tr> <Td> Battle of Halen , a phase of the Battle of the Frontiers . </Td> <Td> </Td> </Tr> <Tr> <Td> August 14 -- 25 </Td> <Td> Battle of Lorraine , a phase of the Battle of the Frontiers . </Td> <Td> </Td> </Tr> <Tr> <Td> August 16 -- 20 </Td> <Td> The Serbs defeat the Austro - Hungarians at
when did great britain declare war on germany wwi
when did great britain declare war on germany wwi
August 4
August 4