Overview
Austria-Hungary's declaration of war against Serbia was one of the reasons for the outbreak of the First World War. But by Fall 1915 the Habsburg Empire had still not defeated their smaller neighbour. So, the Central Powers convinced Bulgaria to join the war and in the fall of 1915 invaded Serbia and forced a Serbian exodus to across the Balkans.
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13 - 1Bloodier Than Verdun? Winter Battles on the Eastern Front 1915 January 16, 2026 -
13 - 2US Empire: American Expansionism In the WW1 Era February 13, 2026
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13 - 3The Massive Forgotten Offensives of 1915 March 13, 2026
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13 - 4Harsher Than Versailles: The Treaty of Brest-Litovsk 1918 April 24, 2026
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13 - 5Why the Allies Lost the Battle of Gallipoli 1915 May 08, 2026
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13 - 6Outbreak of the Russian Civil War 1917-18 June 12, 2026
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13 - 7Why Italy Joined WW1 in 1915 July 10, 2026
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13 - 8Fall of Serbia: Balkan Campaign 1915 August 14, 2026