Serbia By ExecutiveCouncil Jun 10, 1903 King Alexander and Queen Draga of Serbia are murdered in their palace by armed forces. Oct 8, 1912 By a prearranged plan Greece, Bulgaria and Serbia together launch the first Balkan war against the Ottoman Empire May 30, 1913 The Treaty of London, ending the first Balkan war, allows Albania, Bulgaria, Greece, and Serbia to divide up European Turkey. Jun 28, 1914 The assisnation of Archduke Ferdinand. After the assisination, Austria-Hungary planned to attack Serbia with German support. Jul 30, 1914 The Austro-Hungarians cause Russia to mobilize on the border of Austria-Hungary to protect Serbia. Jan 1, 1915 Typhus epidemic sweeps through Serbia, severely weakening the armed forces. Date and month not specified; Year specified Dec 20, 1918 Serbia, Slovenia, Croatia and Montenegro merge as the new kingdom of Serbs, Croats and Slovenes, with the Serbian Peter I as King.