This was followed in December 1909 by the even more famous Friedjung trial. In March 1909 Count Achrenthal had begun in Vienna a violent press campaign against Serbia, accusing the Serbian Government and dynasty of complicity in the concoction of nefarious designs and conspiracies against the integrity of Austria-Hungary. This campaign was thought to be the means of foreshadowing and justifying the immediate military occupation of Serbia. Unfortunately its instigator had not been sufficiently particular as to the choice of his tools and his methods of using them. Among the contributors of the highly tendencious articles was the well-known historian Dr. Friedjung, who made extensive use of documents supplied him by the Vienna Foreign Office. His accusations immediately provoked an action for libel on the part of three leaders of the Croato-Serb coalition who were implicated, in December 1909. The trial, which was highly sensational, resulted in the complete vindication and rehabilitation both of those three Austrian subjects in the eyes of the whole of Austria-Hungary and of the Belgrade Foreign Office in those of Europe; the documents on which the charges were based were proven to be partly forgeries, partly falsified, and partly stolen by various disreputable secret political agents of the Austrian Foreign Office, and one of the principal Serbian ‘conspirators’, a professor of Belgrade University, proved that he was in Berlin at the time when he had been accused of presiding over a revolutionary meeting at Belgrade. But it also resulted in the latter discrediting of Count Achrenthal as a diplomat and of the methods by which he conducted the business of the Austrian Foreign Office, and involved his country in the expenditure of countless millions which it could ill afford.