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Period: to
WWI
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Archduke Franz Ferdinand assassinated
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Austrian Ultimatum to Serbia
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Austria-Hungary declares war on Serbia
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Great Britain declared war on Germany
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Battle of Tannenberg begins
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Trench Warfare begins
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First Battle of the Marne begins
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21 Demands' Made by Japan to China
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Battle for Gallipoli
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Italy joins the allies
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Sinking of the Lusitania
May 7, 1915 -
Battle of Verdun Begins
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The Battle of Jutland
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Battle of the Somme
Battle of the Somme -
Germans unleash U-Boats
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Germany resumes unrestricted submarine warfare
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Zimmermann Telegram published in United States
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America enters the war
April 6, 1917 -
Russian Communist Revolution begins
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Hindenburg Offensive Begins
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Treaty of Brest-Litovsk concluded
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Meuse-Argonne offensive opens
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The armistice is signed
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Kaiser Wilhelm II's Abdication Proclamation
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Treaty of Versailles ended the war