During the Siege of Vienna in 1529, Serbian hussars under the command of Pavle Bakić were the first to engage the Turks when they attacked the capital. After the Ottoman conquest of Syrmia, Radoslav Čelnik sough refuge in Bakić's lands, in Győr. In charters of 1534, Ferdinand again confirmed Bakić and his brothers' holdings (Lak, Győr, Szombathely, Hédervár and all estates that were part of these towns). The fortress of Győr was administered by his Hungarian ally Count György Cseszneky.