 While it is likely that he was present, he had not been with the Ottomans long enough to have become a janissary by that time.Mihailović goes into great detail about that siege and the events that followed.After completing his janissary training, he next serves with the Ottoman Army during its advance against Vlad III of Wallachia, who would later be the inspiration for the novel "Dracula" by Bram Stoker.