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Assassination of Franz Ferdinand
Archduke Franz Ferdinand is assassinated by Gavrilo Princip. -
Austria-Hungary declares war on Serbia
One mounth after Franz Ferdinand's assassination Austria-Hungary declares war on Serbia. -
Serbia joins the war
One mounth after Franz Ferdinand's assassinatoin, Austria-Hungary declares war on Serbia. -
Germany declares war on Russia
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Germany declares war on France
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Great Britain declares war on Germany
Great Britain declares war on Germany after they invaded France. -
Germany invades Belgium
Germany invades Belgium to outflank France's army. -
Austria-Hungary declares war on Russia
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Austria-Hungary declares war on Belgium
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Montenegro declares war on the Ottoman Empire
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France and the United Kingdom declare war on the Ottoman Empire
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Italy declares war on Austria-Hungary
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Germany declares war on Portugal
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Romania enters the war