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King Alexander and Queen Draga of Serbia are murdered in their palace by armed forces.
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By a prearranged plan Greece, Bulgaria and Serbia together launch the first Balkan war against the Ottoman Empire
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The Treaty of London, ending the first Balkan war, allows Albania, Bulgaria, Greece, and Serbia to divide up European Turkey.
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The assisnation of Archduke Ferdinand. After the assisination, Austria-Hungary planned to attack Serbia with German support.
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The Austro-Hungarians cause Russia to mobilize on the border of Austria-Hungary to protect Serbia.
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Typhus epidemic sweeps through Serbia, severely weakening the armed forces.
Date and month not specified; Year specified -
Serbia, Slovenia, Croatia and Montenegro merge as the new kingdom of Serbs, Croats and Slovenes, with the Serbian Peter I as King.