Serbs of Bosnia and Herzegovina in 1910, the winner was Serbian National Organization. On June 28, 1914, Bosnian Serb Gavrilo Princip made international headlines after assassinating Arch Duke Francis Ferdinand in Sarajevo. This sparked World War I leading to Austria-Hungary's defeat and the incorporation of Bosnia and Herzegovina into the Kingdom of Yugoslavia. During WWI, Serbs in Bosnia were often blamed for the outbreak of the war, the assassination of Archduke Franz Ferdinand, and were subjected to persecution by the Austro-Hungarian authorities, including internment and looting of their businesses, by people who were instigated to ethnic violence. Bosnian and Herzegovinian Serbs served in Montenegrin and
Russian entry into World War I was in agreement with President minister Raymond Poincaré who trusted him. He promised unconditional French support to Russia in the unfolding crisis with Germany and Austria. Historians debate whether he exceeded his instructions but they agree he failed to inform Paris of exactly what was happening, and did not warn that Russian mobilization might launch a world war. When on 28 June 1914 Archduke Franz Ferdinand of Austria was assassinated in Sarajevo Tsar Nicholas vacillated as to Russia's course of action. A relatively new factor influencing Russian policy was the growth of the Pan-Slavism spirit that identified Russia's duty to