His principal hopes rested on Prince Bethlen Gabor of Transylvania. This formidable enemy of Austria, and of the Roman Catholic church, not content with the principality which, with the assistance of the Turks, he had wrested from his legitimate prince, Gabriel Bathori, gladly seized this opportunity of aggrandizing himself at the expense of Austria, which had hesitated to acknowledge him as sovereign of Transylvania. An attack upon Hungary and Austria was concerted with the Bohemian rebels, and both armies were to unite before the capital. Meantime, Bethlen Gabor, under the mask of friendship, disguised the true object of his warlike preparations, artfully promising the Emperor to lure the Bohemians into the toils, by a pretended offer of assistance, and to deliver up to him alive the leaders of the insurrection. All at once, however, he appeared in a hostile attitude in Upper Hungary. Before him went terror, and devastation behind; all opposition yielded, and at Presburg he received the Hungarian crown. The Emperor's brother, who governed in Vienna, trembled for the capital. He hastily summoned General Bucquoi to his assistance, and the retreat of the Imperialists drew the Bohemians, a second time, before the walls of Vienna. Reinforced by twelve thousand Transylvanians, and soon after joined by the victorious army of Bethlen Gabor, they again menaced the capital with assault; all the country round Vienna was laid waste, the navigation of the Danube closed, all supplies cut off, and the horrors of famine were threatened. Ferdinand, hastily recalled to his capital by this urgent danger, saw himself a second time on the brink of ruin. But want of provisions, and the inclement weather, finally compelled the Bohemians to go into quarters, a defeat in Hungary recalled Bethlen Gabor, and thus once more had fortune rescued the Emperor.