Barbarossa had made a splendid defence of the city. His force was quite inadequate for the purpose. Solyman was at the time engaged in war with Persia and could not give adequate support. Shortly after this, when war broke out between the Ottomans and Spain, the Sultan invited Barbarossa to Constantinople, and made him Grand Admiral of the Turkish fleet. In this capacity he fought in 1538 a great naval battle off Prevesa against the combined fleets of Spain, Venice, and the Pope, under Admiral Andrea Doria, in which he achieved victory, in spite of great inferiority of numbers and size of vessels. He appears to have been the first to adopt the manœuvre of breaking the line of the enemy’s fleet, for which three centuries later Nelson was so famous. The Turkish fleet numbered a hundred and thirty vessels, and that of the combined Christian Powers a hundred and sixty-seven. Six of the latter were captured and destroyed. The main body of the combined fleet drew off, under cover of the night. Later, Barbarossa accompanied Solyman in the attack on Corfu, which was heroically defended by the Venetians. The Sultan was compelled to withdraw from the island. This failure at Corfu, and that before Vienna, were the only reverses which Solyman personally encountered in his numerous campaigns. Barbarossa, however, in the course of the war with the Venetians, succeeded in capturing from them all the many islands which they possessed in the Ægean Sea, with the exception of Crete and the few fortified places they held in the Morea. These were his last exploits. He died at Constantinople in 1546. Others, however, of the same brood of corsairs or pirates succeeded Barbarossa in the Turkish navy, and maintained its reputation for successful daring. The most distinguished of them were Dragut (or Torghut) and Piale, both of them renegade subjects of Turkey who had taken to piracy as a profession. Dragut, a Croatian by birth, closely resembled Barbarossa in his career, in his prowess at sea, and in the terror which he created on the coasts of Italy and Spain. He had little respect for the allies of the Sultan, and captured their vessels as readily as those of his enemies. When called to account by the Porte for the destruction of some Venetian merchant ships, and summoned to Constantinople, he declined to go there, well knowing the fate in store for him. He betook himself, with his pirate squadron, to Morocco, which he made the base for piracy for some years. Later, Solyman, finding the need of such a daring spirit, invited him again to take service under the Ottoman flag, and promised to make him Governor of Tripoli, if he could capture it. Tripoli then belonged to the Knights of St. John at Malta. Dragut attacked and captured it, and annexed it to the Turkish Empire. Eventually Dragut was appointed Governor of Tripoli and, in this capacity, led a fleet in aid of the attack on Malta in 1565. He lost his life in an assault on the city.