Filippo Scolari's biographer, Poggio Bracciolini writes that Scolariwho was responsible for the defense of the southern frontier as "Ispán", or head, of Temes Countyeducated Hunyadi from his very youth, suggesting that Hunyadi was Scolari's page around 1420. On the other hand, John of Capistrano writes, in a letter of 1456, that Hunyadi started his military career serving under Nicholas Újlaki. For Nicholas Újlaki was at least six year younger than Hunyadi, historian Pál Engel writes that Capistrano confused him with his brother, Stephen Újlaki. Finally, Antonio Bonfini says that at the beginning of his career Hunyadi worked either for Demeter Csupor, Bishop of Zagreb or for the Csákys.