These notable victories roused great enthusiasm in Europe. It was determined to take the offensive against the Ottomans, and to make another effort to drive them out of Europe. A coalition was formed for the purpose between Hungary and Poland, then united under King Ladislaus, and Wallachia and Bosnia. Serbia, which under its king, Stephen Lazariwitch, had been the firm ally of the Ottomans, and had supported them in many campaigns in Asia and Europe, was now induced to abandon this alliance and, under Stephen’s successor, George Brancowitch, to join the confederacy against the Ottomans. The Pope, Eugenius, was most active in support of this combination. His legate, Cardinal Julian Cesarini, led an armed force in support of it. Money was raised for the purpose of the war by a great sale of indulgences to the faithful in every part of Europe. A large contingent of French and German knights joined the allied army. It was, in fact, another crusade, prompted by religious zeal on behalf of Christianity against Islam. The allied army was under the nominal command of Ladislaus, but Hunyadi was its real leader. The Republics of Venice and Genoa gave their support, and as, at this time, the Ottomans had no naval force, it was hoped that these Powers, by means of their numerous and powerful galleys, would prevent the transfer to Europe of Murad’s main army, which was again engaged in conflict with the Karamanians in Asia Minor. The allied army, under these favourable circumstances, crossed the Danube in 1443. It defeated an Ottoman army on the banks of the Masova and again at Nisch. It then crossed the Balkan range in winter—an operation of extreme difficulty, which has since only twice been effected, by General Diebitsch and General Gourko—and again defeated the Turks in a battle at the foot of these mountains. Strange to say, instead of marching onwards to Adrianople, as Diebitsch did in 1829, Hunyadi was content with the laurels already achieved, and returned with his army to Buda, where he displayed his trophies and received a triumph. Murad, on hearing of the retreat of the Hungarians across the Balkans, determined to come to terms with them, and not to pursue them again across the Danube. With some difficulty, and in spite of the sullen opposition of Cardinal Julian and the French contingent, a treaty was agreed to, at Szegeddin, with Ladislaus, by which Serbia was to be freed from dependence on the Ottoman Empire and Wallachia was to be ceded to Hungary. The treaty was to be in force for ten years. It was solemnly sworn to on the Gospel and the Koran by Ladislaus and Murad.