Battle of Kolubara their respective commands, and the 5th and 6th armies were merged into a single 5th Army of 95,000 men. On 28 June 1914, Bosnian Serb student Gavrilo Princip assassinated Archduke Franz Ferdinand of Austria in Sarajevo. The assassination precipitated the July Crisis, which led Austria-Hungary to issue an ultimatum to Serbia on 23 July on suspicion that the assassination had been planned in Belgrade. The Austro-Hungarian government made the ultimatum intentionally unacceptable to Serbia, and it was indeed rejected. The Austro-Hungarians declared war on Serbia on 28 July and that same day the Serbs destroyed all bridges on the Sava
Ferdinand II, Archduke of Austria Anna Juliana) became Holy Roman Empress Anna, consort of Emperor Mathias, who received his Further Austrian inheritance. He and his first wife Philippine Welser were parents of four children: On 14 May 1582, Ferdinand married his niece Anne Catherine. She was a daughter of William I, Duke of Mantua, and Eleonora of Austria, younger sister of Ferdinand. They were parents to three daughters: He had at least two illegitimate children: –With Anna von Obrizon: –With Johanna Lydl von Mayenburg: Ferdinand II, Archduke of Austria Ferdinand II, Archduke of Further Austria (Linz, 14 June 1529 – 24 January 1595, Innsbruck) was