Diego stood out in the famous battles of
Terceira and
Lepanto. He was also crucial in the fight against corsairs on the
Galician and
Portuguese coasts. On 7 February 1588, Diego de Medrano wrote a letter in
Lisbon, addressed to King
Philip II of Spain, recalling twenty five years of his previous
naval warfare experience, writing: I beseech you to remember my twenty-five years of service, including the twenty years in these galleys, during which I assisted in the relief of Cyprus as captain of the galley Fortuna of Naples, and also in the naval battle of Lepanto, where I served to the satisfaction of the late Don Juan of Austria, and in the expedition to Navarino, where I was entrusted with twelve galleys. In the expedition to Tunis and other occasions, the late Marqués de Santa Cruz entrusted me with many bands of galleys for Sicily, Naples, and Spain. When Your Majesty assigned the galleys to the said Marqués, he immediately sent me to winter in Gibraltar with eight galleys under my command, to attend to the construction of that port and the guard of that strait, as Your Majesty knows. The following spring, by Your Majesty's order, I accompanied Pedro de Vanegas on his return from Safi, who was going to Barbary with twelve galleys, and I continued with the squadron of galleys until they arrived at the expedition of this kingdom, guarding the coast of Andalucia. There were several occasions when I captured a French ship, which Your Majesty acknowledged with satisfaction, and I guarded the coast of Spain with them. I brought Don
Pedro de Padilla to Orán and to the officials who went to take possession of the African borders, all by Your Majesty's order. Lastly, I took the galleys to the Tercio, as Your Majesty knows and as I served. with a
Fortuna as an ensign. General Diego de Medrano commanded four Neapolitan galleys, leading a force of 400 sailors and 110 artillery pieces while overseeing 900 enslaved rowers. It was the largest naval battle in western history since classical antiquity, involving more than 450 warships. The victory of the Holy League is of great importance in the
history of Europe and of the Ottoman Empire.
Conquest of Tunis (1573) .
The Walters Art Museum. In 1572, Juan de Austria wintered in
Naples and received instructions from His Majesty to set out in the spring of 1573 with the fleet to capture
Tunis, as the Turks had seized the kingdom from
Abu Abdallah Muhammad V al-Hasan, a vassal of the King of Spain. His Highness directed
Álvaro de Bazán, Marquess of Santa Cruz to advance with 4,000 men to Tunis and, if possible, take control of the city and fortress. In the expedition to Tunis, the
Marqués de Santa Cruz entrusted Captain Medrano with many bands of galleys for Sicily, Naples, and Spain.
Álvaro de Bazán, Marquess of Santa Cruz, appointed squadron General Diego de Medrano to command twelve galleys which played a crucial role at the
battle of Terceira in 1583, ultimately securing the island. The naval battle of Vila Franca do Campo, also known as the naval battle of Terceira Island, started on 26 July 1582, off the coast of the
island of São Miguel in the Portuguese archipelago of the Azores, during the
War of the Portuguese Succession. To reinforce the Spanish in this battle,
Álvaro de Bazán, Marquess of Santa Cruz, meticulously prepared twelve galleys from the Spanish fleet and entrusted them to the "brave and experienced" Captain Diego de Medrano in the spring of 1583. In the
Invincible, he is mentioned among the valiant captains and lords who followed the Spanish fleet, specifically: From the galleys, Captain Medrano, who led them on the expedition to the island of Terceira. On 10 July 1583, Jorge Manrique wrote to King Philip II of Spain regarding Captain Medrano's successful navigation and victory: Captain Diego Medrano crossed with the 12 galleys, and during the navigation, he was so vigilant and careful, and everything turned out so well, that he deserves to be shown great favor by Your Majesty, as a demonstration, so that others may be encouraged to take on what everyone judged to be so difficult, and to encourage him to do so, considering its great importance. I promised him in the gulf that I would bring this matter to Your Majesty, as I am doing now, and I beg Your Majesty to release me from this obligation, as everything should be for your better service. May God keep you, etc. — From the city of
Punta Delgada, July 10, 1583. — D. Jorge Manrique. Despite the risks of navigating the Gulf of the Yeguas in low, broad ships prone to instability in rough seas, especially given previous difficulties encountered by ships sent by Alonso Bazán, Medrano and his twelve galleys successfully reached the island of San Miguel. This achievement was greatly admired and celebrated by the Spanish.
Navigating the Island of São Miguel in the
Azores On 3 July 1583, Diego de Medrano was ordered to navigate the Island independently before the rest of the fleet arrived. It took the rest of the fleet 10 days after the galleys' arrival to finally gather at São Miguel. The fleet was also tasked with loading the siege artillery, gun carriages, carts, and all the equipment needed to operate the artillery, along with the mules required to move the pieces, as well as the munitions and supplies stored on São Miguel.
Spanish victory at the Island of Terceira and the Iberian union The Spanish victory in 1583 resulted in the rapid Spanish conquest of the
Azores and completed the incorporation of
Portugal into the
Spanish Empire. After the success of Bazán and Medrano, the Empire of Spain reached the apex of its naval power as a result of the combined might of its navy with the Portuguese navy, effectively becoming the most powerful maritime force in the world. Contemporary observers recognized the magnitude of this union. The Dominican preacher Brother Hernando del Castillo wrote that, with the union of the kingdoms of Portugal and Castile, Philip II would be "the most powerful lord and king in the world." The conquest of Terceira in 1583 and the success of the campaign was not only due to the strength and discipline of the forces but also to the meticulous planning and execution of the landing by Diego de Medrano. His galleys were crucial in selecting the right landing site, executing a feint towards Plaía, and defending and ensuring the swift consolidation of the beachhead, which were key factors in the overall victory. Indeed, Medrano's coordination of feint and force marked one of the earliest modern amphibious assaults, anticipating the tactics later used in large-scale naval landings. == The Spanish Armada (1588) ==