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Great Britain declares war on Germany.
The UK declares war on Germany for violation of Belgium's neutrality. -
Franz Ferdinand assassinated
Austria-Hungary's archduke is assasinated while visiting Serbia by G. Princip -
Austria-Hungary declares war on Serbia
Austria Hungary declares war on Serbia for killing Franz Ferdinand. Russia mobilizes. -
Period: to
World War I
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Germany declares war on Russia
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Germany declares war on France
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Austria-Hungary declares war on Russia and Serbia declares war on Germany.
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Britain's 'Lusitania' sunk by German U-boat
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Battle of Verdun begins
longest and bloodiest battle in WWI -
Tanks introduced
Tanks are brought into the war during the Battle of Somme -
Zimmerman Note
Germany sends the Zimmerman Note to Mexico in an effort to entice Mexico to join the war. In return, they would get New Mexico, Texas, and Arizona back. -
USA declares war on Germany
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The Bolsheviks overthrow Russian Government
Led by Vladimir Lenin. -
The armistice is signes
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The Treaty of Versailles
officially ended WWI