 John Hunyadi developed his military skills during his journeys in Italy and Bohemia in Sigismund 's entourage in the early 1430s . He and his younger brother ( who was his namesake ) were jointly appointed Ban of Szörény ( present @-@ day Dobreta @-@ Turnu Severin , Romania ) in 1439 by Sigismund 's successor , King Albert . With this appointment , they acquired the status of " true barons " . 
