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Period: to
WWI
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Archduke Franz Ferdinand was Assassinated
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Austria's Ultimatum to Serbia
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Austria Declares War on Serbia
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Britain Declares War on Germany
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Battle of Tannenberg Begins
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First battle of the Marne Begins
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Trench Warfare Begins
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Japan Presents the 21 Demand to China
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Battle of Gallipoli
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Sinking of the Lusitania
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German U-Boat Warfare Begins
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Italy Joins the Allies
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Battle of Jutland Begins
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Battle of Verdun Begins
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Battle of the Somme
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Zimmerman Note Discovered
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Unrestricted U-Boat Resumed
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America Enters the War
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Russian Communist Revolution Begins
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Treaty of Brest-Litovsk Signed
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Hindenburg Offensive Begins
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Meuse-Argonne Offensive Begins
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The Armistice is Signed
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Kaiser Wilhelm Abdicates
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Treaty of Versailles Ends the War