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The Archduke of Austria-Hungary is assassinated.
A young Serbian terroritst (a member of the Black Hand) kills the Archduke, Francis Ferdinand, and his wife -
Period: to
The Great War
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Austria-Hungary declares war on Serbia
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Russia mobilizes
Mobilization is considered as an act of war. -
Great Britain declares war on Germany
For violation of Belgium’s neutrality. -
Lusitania sinks
It was sunk by German U-Boats -
Italy betrays the Triple Alliance by attacking Austria
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Germany declares unrestricted submarine warfare for the second time.
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U.S joins WWI
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Allies advance towards Germany
German gamble fails (to end stalemate near Paris). -
An Armisice is signed
This is a cease fire signed at the 11th hour.