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heir to the Austro-Hungarian throne, who was killed in Sarajevo along with his wife Duchess Sophie by Bosnian Serb Gavrilo Princip.
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Austria-Hungary declares war on Serbia. Russia mobilizes.
The Netherlands declare neutrality. -
Germany declares war on Russia.
Germany and the Ottoman Empire sign a secret alliance treaty -
Belgium denies permission for German forces to pass through to the French border.
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Austria-Hungary declares war on Russia.
Serbia declares war on Germany. -
The BEF started its retreat from Mons. Germany invaded France.
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Battle of the Marne started.
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Turkey entered the war on Germany’s side. Trench warfare started to dominate the Western Front.
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The first Zeppelin raid on Britain took place
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Britain bombarded Turkish forts in the Dardanelles
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Italy declared war on Germany and Austria
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The Germans captured Warsaw from the Russians
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Start of the Battle of Verdun
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Battle of Jutland: as a naval battle fought by the British Royal Navy's Grand Fleet under Admiral Sir John Jellicoe, against the Imperial German Navy's High Seas Fleet under Vice-Admiral Reinhard Scheer during the First World War
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First use en masse of tanks at the Somme.
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Germany’s unrestricted submarine warfare campaign started
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USA declared war on Germany
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France launched an unsuccessful offensive on the Western Front
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Britain launched a major offensive on the Western Front
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Second Battle of the Marne started. The start of the collapse of the German army
