February 1914. On 24 June 1914, just four days before Archduke Franz Ferdinand of Austria was assassinated in Sarajevo, Pacelli, together with Cardinal Merry del Val, represented the Vatican when the Serbian Concordat was signed. Serbia's success in the First Balkan War against Turkey in 1912 had increased the number of Catholics within greater Serbia. At this time Serbia, encouraged by Russia, was challenging Austria-Hungary's sphere of influence throughout the Balkans. Pius X died on 20 August 1914. His successor Benedict XV named Gasparri as secretary of state and Gasparri took Pacelli with him into the Secretariat of State, making him undersecretary. During World War I, Pacelli maintained the Vatican's registry of prisoners of war and worked to implement papal relief initiatives. In 1915, he travelled to Vienna to assist Raffaele Scapinelli, nuncio to Vienna, in his negotiations with Emperor Franz Joseph I of Austria regarding Italy. Archbishop and papal nuncio Pope Benedict XV appointed Pacelli as nuncio to Bavaria on 23 April 1917, consecrating him as titular Archbishop of Sardis in the Sistine Chapel on 13 May 1917, the same day as the first apparition of the Blessed Virgin Mary in Fatima, Portugal. After his consecration, Eugenio Pacelli left for Bavaria. As there was no nuncio to Prussia or Germany at the time, Pacelli was, for all practical purposes, the nuncio to all of the German Empire. Once in Munich, he conveyed the papal initiative to end the war to German authorities. He met with King Ludwig III on 29 May, and later with Kaiser Wilhelm II and Chancellor Theobald von Bethmann Hollweg, who replied positively to the Papal initiative. However, Bethmann Hollweg was forced to resign and the German High Command, hoping for a military victory, delayed the German reply until 20 September. Sister Pascalina later recalled that the Nuncio was heartbroken that the Kaiser turned a "deaf ear to all his proposals". She later wrote, "Thinking back today on that time, when we Germans still all believed that our weapons would be victorious and the Nuncio was deeply sorry that the chance had been missed to save what there was to save, it occurs to me over and over again how clearly he foresaw what was to come. Once as he traced the course of the Rhine with his finger on a map, he said sadly, 'No doubt this will be lost as well'. I did not