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
Archduke Joseph Árpád of Austria 1956 and religiously on 12 September 1956 in Bronnbach, Wertheim am Main, Baden-Württemberg, Germany. They had eight children: Archduke Joseph Árpád of Austria Archduke Joseph Árpád Benedikt Ferdinand Franz Maria Gabriel (; 8 February 1933 – 30 April 2017) was a member of the Hungarian Palatine branch of the House of Habsburg-Lorraine. He was born in Budapest, the son of Archduke Joseph Francis of Austria and his wife, Princess Anna of Saxony. He was the great-grandson of Archduchess Gisela of Austria. He received a degree in economics from the University of Lisbon. Joseph married Princess Maria von Löwenstein-Wertheim-Rosenberg, born 1935,