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Crown Prince Franz Ferdinand is assassinated, 29 June 1914.

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Crown Prince Franz Ferdinand is assassinated, 29 June 1914.

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World War I begins when Austria-Hungary declares war on Serbia, 28 July 1914.

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World War I begins when Austria-Hungary declares war on Serbia, 28 July 1914.

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Allied and German forces begin the first of what would be three battles to control the city.

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The first Battle of Ypres, October 1914.

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The first Battle of Ypres, October 1914.

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The German army initiats the moderns era of chemcial warfare by launching a chlorine attack on Allied trenches.

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The second Battle of Ypres begings, 22 April 1915.

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The second Battle of Ypres begings, 22 April 1915.

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Breaking through German-allied Ottoman Turkey´s Dardanelles Strait, which would allow them to attack Germany and Austria and establish a link with Russia.

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The Gallipoli Campaign beging, 25 April 1915.

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The Gallipoli Campaign beging, 25 April 1915.

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The predominatly British Allied force aimed to relieve preassure on the French by attcking Germans hundreds away in the Somme.

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The Soviet government concludes a separate peacewith the Central Powers when it accepts the Treaty of Brest-Litovsk, 3 March 1918.

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The Soviet government concludes a separate peacewith the Central Powers when it accepts the Treaty of Brest-Litovsk, 3 March 1918.

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People of the Bolshevik party seized vital points in the Russian capital, overthrew the Russian government, and established the first socialist state.

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The Bolshevik Revolution, 7 November 1917.

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The Bolshevik Revolution, 7 November 1917.

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The signing of the Armistice, 11 November 1918.

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The signing of the Armistice, 11 November 1918.