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Germany declares a submarine blockade of Great Britain. Any ship approaching England is considered a legitimate target.
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Russia announces full mobilization of her armed forces.
As an ally of Serbia Russia had to mobilize -
Germany mobilizes her armed forces and declares war on Russia
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Germany declares war on france
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Germany declares war on neutral Belgium
invades in a right flanking move designed to defeat France quickly. As a result of this invasion, Britain declares war on Germany. -
Austria-Hungary declares war on Russia
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First Battle of the Marne halts German invasion in France.
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First trenches of the Western front are dug.
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Unofficial Christmas Truce declared by soldiers in the trenches along the Western Front.
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War becomes "Total War" with German Zeppelin air raid on England
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Allies begin nine-month battle for the Turkish peninsula of Gallipoli.
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U-boat sinks the Lusitania. 1,198 civilians, including 128 Americans die.
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Germany responds to U.S. anger by ceasing to sink ships without warning.
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Tsar Nicholas takes command of the Russian armies.
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British use gas in battle near Loos, but shifting winds cause 60,000 British casualties.
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Sir Douglas Haig becomes commander of British Expeditionary Force.
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Allies begin withdrawal of troops from Gallipoli.
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US President Wilson publicly warns Germany not to continue unrestricted submarine warfare policies
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Woodrow Wilson re-elected President of the United States
campaign slogan: "He kept us out of the war" -
David Lloyd George becomes Prime Minister of Britain.