In the following year, 1356, John sent a golden bull to the pope at Avignon containing the terms of his submission.[80] The pope thereupon expressed his satisfaction by a reply to the emperor, and while communicating the good news to the knights of Rhodes, the king of Cyprus, and the doge of Venice, invited them to make preparations to aid the Christian cause. So far, however, as the empire was concerned, the series of efforts made at the pope’s instigation were without any satisfactory result. Ill planned, inadequately supported, unenergetically pursued, they were all almost useless. Six years afterwards--namely, in 1362--John was invited to join the kings of France and Denmark and Guy de Lusignan of Cyprus in a Crusade against the Saracens, an expedition of quite secondary importance to the empire. To the men of the West, Turks and Saracens were all the same. The Greeks knew better. Two years passed and a new pope, Urban the Fifth, was still organising a plan against the Saracens. In reply to the pontiff’s invitation John promised all the aid possible to the new Crusade, though pointing out that the benefit to the empire would be slight. But the sovereigns of the West had had enough of Crusades and would not respond to the call from Avignon. The companies of military monks who were in France equally refused to take part in the proposed undertaking, and the efforts of the pope only succeeded in inducing a few English adventurers to join with Peter of Lusignan in a fruitless attack upon Egypt. At length, in 1366, a more hopeful Crusade, or at least one more likely to result in advantage to the empire, was proclaimed. At the bidding of the pope, Louis, king of Hungary, and Amadeo of Savoy proposed to attack the Turks and to aid the emperor. Once more the condition was attached that John should complete the Union of the Churches. But, once again, the crusading army was weakened by the division of forces judged necessary for an attempt at the same time upon the Saracens. Nor would other states join. In vain the pope threatened the Genoese, Venetians, and Spaniards with all the terrors of an interdict if they gave aid to the enemy. They continued to trade with the Saracens as before. In vain he exhorted the sovereigns of Western Europe to go to the aid of Cyprus and Rhodes, and promised them indulgences if they would take part in this war of the Cross. They turned deaf ears to his summons.