This mistake was bound to bear fruit, when the new Governor, Don Juan of Austria, a natural son of Charles V who had covered himself with glory at the battle of Lepanto, reached the country, in November 1576. Philip, aware that the Netherlands would escape him if he did not make some sacrifices, had given Don Juan still freer instructions than those given to Requesens. The religious question only was excluded from concessions. Besides, the king hoped that the Belgians would be flattered by the choice of a prince of the blood and would be captivated by the romantic reputation of this striking representative of Renaissance nobility. Negotiations between Don Juan and the States General were rendered difficult by the opposition of the partisans of Orange and by the want of good faith on the part of the new Governor, who, while promising to recall the Spanish troops, was discovered secretly negotiating with them. The first Union of Brussels was, however, concluded on January 9, 1577. The States promised to obey the king and to maintain the Catholic religion as the only State religion all through the country. On the other hand, Don Juan, by the Edict of Marche, known as "Edit Perpetuel," undertook to convoke the States General, to recall the Spanish troops and not to persecute the partisans of the Reform. Orange and his partisans in Holland and Zeeland naturally refused to ratify such an arrangement, which violated the articles of the Pacification of Ghent. Don Juan entered Brussels in May, after dismissing the Spanish troops, but, in spite of all his efforts, was unable to ingratiate himself in the eyes of the population. Most of the people had resented the signature of the Union of Brussels, and when the negotiations with the Northerners broke off and Don Juan asked for troops to fight them, he met with a curt refusal. Alarmed by this veiled hostility and exasperated by his protracted negotiations with Orange, Don Juan shut himself up in the fortress of Namur and recalled the Spanish troops. Nothing better could have happened from the point of view of the patriots, and the differences which had begun to undermine the work of the Pacification of Ghent, during the last months, were promptly forgotten. William of Orange made a triumphal entry into Brussels on September 23rd. He was greeted as the liberator of his country, amid scenes of unbounded enthusiasm. He was proclaimed "Ruwaert" of Brabant and his authority did not meet with any further open opposition.