The parricide Stephen Tomašević at once usurped the throne, though Stephen Thomas is often regarded by Bosnians as their last king. The Catholic and anti-Turkish party were now triumphant, and the new King began his reign by an appeal to the feudal nobility of Bosnia to meet him with their retainers equipped for battle against the Infidel, on the field of Kóssovo. This summons is dated Pristina, June 3, 1459, and is one of the last records of feudal Bosnia. The Barons, Prelates, Nobles, Voivodes, and magnates of the realm,[107] are summoned by name. The Župans[108] of Rascia and of Serbia, with their banners and retainers, the Ban of Jaycze, the Ban of Ussora, the Duke of St. Sava, and the lesser nobles, are marshalled before us on parchment. The King appeals to their orthodox bigotry, and seems to take an illustration from the fire-drakes of Sclavonic folk-lore. ‘What faithful Christian,’ he asks, ‘and zealous lover of the orthodox faith can restrain his tears when considering the capture of Constantinople?’ He calls on the Barons aforesaid ‘to meet us on the field of Kóssovo in June, for we ought in a body to advance against the dragon, lest he spit forth over us his venom.’[109] But King Stephen Tomašević inherited his father’s poltroonery, with more than his father’s bigotry. We do not know that he ever met the Turks at Kóssovo; but we know that this same year he turned the arms of his orthodox Magnates against his unoffending Bogomile subjects, and hounded 40,000 of them from the realm. His brave generals, Paul Kubretić and Tomko Mergnjavić, defended severally the line of the Drina and the Rascian frontier with success, but the surrender of Semendria which the Hungarians had intrusted to his safe-keeping, to the Turks, had irritated Mathias Corvinus and the powerful Hungarian faction among the Magnates, and this dissatisfaction was intensified by Tomašević throwing himself and his kingdom at the feet of the Papacy, which, however, wisely refused to accept it. Meanwhile it was no secret that Mahomet was preparing for his great invasion of Bosnia.