Ferdinand and Zapolya both hastened to send embassies to the Turks, Ferdinand taking the first step. He sent envoys to Upper Bosnia and to Belgrad to ask the governors to refuse aid to Zapolya, offering three to six thousand ducats for their alliance.[103] One of the governors died before the embassy reached him, and from neither of them were there any results from this mission.[104] At the same time Ferdinand attacked Zapolya, driving him from Ofen and back towards Transylvania. Zapolya in distress despatched his first mission to the Porte. His envoy, Hieronymus Laszky, was empowered to effect a defensive and offensive alliance with the sultan. The mission was successful, Suleiman accepting Zapolya’s offer of devotion, and promising him the crown of Hungary and the protection of the Porte against his enemies. Although the mission from Zapolya was kept as secret as possible, it soon became known to Ferdinand, who dispatched the embassy he had long planned, in the hope of counteracting Zapolya’s move. One embassy failed to reach Constantinople,[105] and the first ambassadors from the archduke of Austria to reach the Porte were John Hobordonacz and Sigmund Weixelberger, in May, 1528. They demanded the Kingship of Hungary for their master Ferdinand, and the restoration to Hungary of all the places taken by Suleiman. The sultan refused both of these demands and in his turn offered to make peace on the payment of tribute. The embassy accomplished nothing, its sequel being the campaign in Hungary in 1529. Three days before the final answer to Ferdinand, Suleiman had in full divan delivered to Ibrahim a commission making him serasker or general‐in‐chief of the expedition against the Hapsburgs. The Peace of Cambrai in 1529 left the Austrians free to fight the Turks.