 His annual revenues only allowed him to hire 5,000 mercenaries for two months, thus Ferdinand asked for help from his brother, Emperor Charles V, and started to borrow money from rich bankers like the Fugger family.Ferdinand defeated Zápolya at the Battle of Tarcal in September 1527 and again in the Battle of Szina in March 1528.Zápolya fled the country and applied to Sultan Suleiman the Magnificent for support, making Hungary an Ottoman vassal state.