Franz Joseph I of Austria the Empire on 6 October 1908. However a diplomatic crisis erupted, as both the Serbs and the Italians demanded compensation for the annexation, which the Austro-Hungarian government refused to entertain. The incident was not resolved until the revision of the Treaty of Berlin in April 1909, exacerbating tensions between Austria-Hungary and the Serbs. On 28 June 1914 Franz Joseph's nephew and heir Archduke Franz Ferdinand, and his morganatic wife Sophie, Duchess of Hohenberg, were assassinated by Gavrilo Princip, a Yugoslav nationalist of Serbian ethnicity, during a visit to Sarajevo. When he heard the news of the assassination, Franz Joseph said
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