Stephen III of Moldavia
John desired to pose as the champion of Christendom against the Ottoman Turks. Circumstances seemed, moreover, to favor him. In his brother Ladislaus, who as King of Hungary and Bohemia possessed a dominant influence in central Europe, he found a counterpoise to the machinations of Emperor Maximilian I, who in 1492 had concluded an alliance against him with Ivan III of Muscovy. As suzerain of Moldavia, John was favorably situated for attacking the Turks. At the conference of Leutschau (1494), the details of the expedition were arranged between the kings of Poland and Hungary and Elector John Cicero of Brandenburg, with the co-operation of Stephen III of Moldavia, "prince" of Moldavia, who had appealed to John for assistance.