The abuse of the Knights fell upon sympathetic ears; in his early days Soliman the Magnificent had expelled the Knights from Rhodes; since then Charles V. had given them the islands of Malta and Gozo, and the town of Tripoli in Barbary as their abiding place; from Malta they had never ceased their warfare against the corsairs, and incidentally against the Sultan and his subjects. Therefore, in this year 1551, Soliman ordained that an expedition should be prepared with the object of crushing once and for all these troublers of the peace of Islam. The preparations were on so large a scale that very soon it became noised abroad in Europe that something really serious was in the wind: in Constantinople, however, men kept their own counsel; it was ill talking of the affairs of the Padishah, and, further than that, beyond Dragut and the proposed leaders of the expedition, the Sultan took no one into his confidence. Charles V., well served as he was by his spies, was as much in the dark as to the destination of this new armada as were humbler folk; in it he recognised the hand of Dragut again, and Doria had standing orders to catch that mischievous person if he could. At present, however, there was no chance of so desirable a thing happening, as Dragut was superintending the fitting out of the new expedition at Constantinople.
Anxious and suspicious of the designs of the Turks, Charles ordered a concentration of his fleet at Messina.
The Grand Master of the Knights of Malta at this time was a Spaniard, one Juan d’Omedes; he was, says de Vertot, “un Grand Maitre Espagnol,” meaning by this that he was completely under the domination of the Emperor and ready at any time to place the galleys of “the Religion” under the orders of that monarch. The Knights, like every one else, had watched with anxiety the preparation of this great expedition in Constantinople, and when the Grand Master proposed to send the galleys of the Order to join forces with Doria at Messina, there was great dissatisfaction at the Council Board. That which it behoved them to do, the members informed the Grand Master, was not to help a great potentate like Charles, but to make provision for their own security by attending to their fortifications, which were in anything but a satisfactory condition. D’Omedes maintained that this expedition was destined to serve with the King of France against the Emperor, and that Malta was not the objective. He accordingly sent away the galleys of “the Religion” under the Chevalier “Iron-Foot,” the General of the Galleys, to join the fleet which had its rendezvous at Messina. Hardly had he done so when news came from the Levant that the fleet of the Grand Turk was at sea heading for Sicily. The fleet was composed of one hundred and twelve royal galleys, two great galeasses, and a host of brigantines and transport vessels. Sinan-Reis was in command with twelve thousand Janissaries, numerous pioneers and engineers, and all the necessary appliances for a siege.