was the second of three s built in the 1910s for the Spanish Navy. Named after King Alfonso XIII of Spain, the ship was not completed until 1915 owing to a shortage of materials that resulted from the start of World War I the previous year. The class was ordered as part of a naval construction program to rebuild the fleet after the losses of the Spanish–American War; the program began in the context of closer Spanish relations with Britain and France. The ships were armed with a main battery of eight guns and were intended to support the French Navy in the event of a major European war.
Despite the reason for the ships' construction, Spain remained neutral during World War I. s early career passed largely uneventfully with routine training exercises in Spanish waters, though she was used to assist civilian vessels in distress and her crew was deployed to suppress civil unrest in Spain. In the 1920s, she took part in the Rif War in the Spanish protectorate in Morocco, where her sister was wrecked. In 1931, Alfonso XIII abdicated and the Second Spanish Republic was proclaimed; the new republic sought to erase remnants of the royal order, and so was renamed . As part of cost-cutting measures, the ship was then reduced to reserve. Plans to modernize and her sister in the mid-1930s came to nothing when the Spanish coup of July 1936 initiated the Spanish Civil War.
At the start of the conflict, the crew murdered the ship's officers and attempted to resist the Nationalist rebels in Ferrol, but after the Nationalists seized coastal artillery batteries, they surrendered. then became the core of the Nationalist fleet and she was used to enforce a blockade of the north coast of Spain, frequently patrolling and stopping freighters that attempted to enter the Republican-controlled ports of Gijón, Santander, and Bilbao. During these operations on 30 April 1937, she was fatally damaged when she accidentally struck a mine that had been laid by a Nationalist minelayer. Most of her crew was evacuated by the destroyer before capsized and sank; only four were killed in the sinking. The wreck was discovered and examined in 1984.
Design
Following the destruction of much of the Spanish fleet in the Spanish–American War of 1898, the Spanish Navy began a series of failed attempts to begin the process of rebuilding. After the First Moroccan Crisis strengthened Spain's ties to Britain and France and public support for rearmament increased in its aftermath, the Spanish government came to an agreement with those countries for a plan of mutual defense. In exchange for British and French support for Spain's defense, the Spanish fleet would support the French Navy in the event of war with the Triple Alliance. A strengthened Spanish fleet was thus in the interests of Britain and France, which accordingly provided technical assistance in the development of modern warships, the contracts for which were awarded to the Spanish firm (SECN), which was formed by the British shipbuilders Vickers, Armstrong Whitworth, and John Brown & Company. The vessels were authorized some six months after the British had completed the "all-big-gun" , and after discarding plans to build pre-dreadnought-type battleships, the naval command quickly decided to build their own dreadnoughts.
was long at the waterline and long overall. She had a beam of and a draft of ; her freeboard was amidships. The ship displaced as designed and up to at full load. Her propulsion system consisted of four-shaft steam turbines manufactured by Parsons that drove four screw propellers. Steam was provided by twelve Yarrow boilers. The engines were rated at and produced a top speed of . had a cruising radius of at a speed of . Her crew consisted of 854 officers and enlisted men.
was armed with a main battery of eight 50-caliber guns, mounted in four twin gun turrets. One turret was placed forward, two were positioned en echelon amidships, and the fourth was aft of the superstructure. This mounting scheme was chosen in preference to superfiring turrets, as was done in the American s, to save weight and cost. For defense against torpedo boats, she carried a secondary battery that consisted of twenty guns mounted individually in casemates along the length of the hull. They were too close to the waterline, however, making them unusable in heavy seas. She was also armed with four 3-pounder guns and two machine guns. Her armored belt was thick amidships; the main battery turrets were protected with the same amount of armor plate. The conning tower had thick sides. Her armored deck was thick.
Service history Early career
The keel for was laid down at the SECN shipyard in Ferrol on 23 February 1910 and her completed hull was launched on 7 May 1913. Fitting-out work was delayed by the start of World War I in July 1914, since much of the equipment, including her guns and fire-control systems, were supplied by British manufacturers that were now occupied with production for the British war effort. was completed on 16 August 1915, albeit with an improvised fire-control system that was secured through neutral countries. After Italy, a member of the Triple Alliance, declared neutrality at the start of the war, Spain followed suit, since the participation of its fleet in the pre-war agreements with Britain and France had been predicated on the need to reinforce the French fleet against the combined Italian and Austro-Hungarian navies. After entering service, sailed with her sister to Santander, where the ship's namesake, King Alfonso XIII was aboard his yacht . The two battleships then took part in training exercises off Galicia. At the end of the year, s crew won the Spanish Christmas Lottery.
The peacetime routine of the Spanish fleet included training exercises, frequently held off Galicia, and a fleet review off Santander during the King's usual summer vacation there. The year 1916 passed uneventfully until September, when joined the search for the destroyer , which had encountered severe weather in the Bay of Biscay and had been disabled by storm damage. The battleship assisted the tugboat in April 1917 after the latter vessel had run aground off Cabo Prior. The tug had been carrying a load of mines, which took aboard to lighten so she could be pulled free. By this time, socialist and anarchist groups in Spain campaigned for a general strike and a revolution against the monarchy, prompting the military governor of Bilbao to request s presence to help restore order in August. The ship's landing party went ashore to guard a rail line and several mines. In a clash with revolutionaries, one man from the ship's crew was killed and several were injured, while twenty-two revolutionaries were arrested and held aboard the ship. again helped to suppress striking workers in early 1919, when, after having sailed to Barcelona for the commissioning of the submarine , she arrived in the midst of the La Canadiense strike against the Barcelona Traction company. again sent men ashore to protect the company during the strike that lasted for 44 days.
In 1920, the Spanish Navy embarked on a series of long-distances cruises to show the flag, in part to demonstrate its growing power. was sent to tour the Caribbean Sea and visit the United States, departing Ferrol for Havana, Cuba, by way of a stop in the Canary Islands on 22 June. On arriving in Havana on 9 July, she met an enthusiastic reception that belied the Cuban rebellion against Spanish rule in the 1890s. then steamed to Puerto Rico, which had also been part of the Spanish colonial empire until the war of 1898, and where the ship was also warmly received. The ship also visited Annapolis in the United States; the unprotected cruiser , a former Spanish cruiser that had been captured during the war with the United States and commissioned into the US Navy, flew the Spanish flag to honor her visit. concluded the tour with a stop in New York City in mid-October, after which she re-crossed the Atlantic, arriving back in Spain in November. In April 1921, the ship visited Lisbon, Portugal, during ceremonies held to commemorate the country's soldiers who had been killed during World War I.
Rif War Throughout the early 1920s, she provided naval fire support to the Spanish Army in its campaigns in Morocco during the Rif War that had broken out in mid-1921. At the start of the conflict on 16 July 1921, was operating on the northern coast of Spain. She took on a full stock of coal at Santander on 22 July and immediately got underway to provide gunfire support to Spanish forces in the colony. She arrived off Melilla on 10 August and began shelling rebel positions the next day. Her landing party went ashore to reinforce the Spanish soldiers in the area. On 17 September, she and bombarded Rif positions south of Melilla while Spanish Foreign Legion troops assaulted the positions. continued to operate off the coast of Spanish Morocco through 1922, including a bombardment of Rif artillery batteries that were being used to target coastal shipping. The batteries scored several hits on the ship, but she was not significantly damaged and her crew suffered no casualties.
In August 1923, she participated in the first combined arms operation in Spanish military history that included aircraft, warships, and ground forces operating together. The fleet was used to support an amphibious assault west of Melilla. On 26 August, during the operation, was wrecked off Cape Tres Forcas. came alongside to take off her crew, ammunition, and other supplies to lighten the vessel so she could be pulled free. Over the next year, work continued to refloat the vessel that ended in failure when a storm destroyed the ship in November 1924. During this period, tensions over the European colonial holdings in North Africa—predominantly stoked by Italy's fascist leader Benito Mussolini over the perceived lack of prizes for Italy's eventual participation in World War I on the side of the Entente—had led to a rapprochement between Italy and Spain in 1923, which was at that time ruled by the dictator Miguel Primo de Rivera. Primo de Rivera sent a fleet consisting of , her sister , the light cruiser , two destroyers, and four submarines to visit the Italian fleet in late 1923. They departed Valencia on 16 November and stopped in La Spezia and Naples, arriving back in Barcelona on 30 November.
By 1925, the Rif rebels had widened the war by surrounding and taking over several French positions in neighboring French Morocco. Spain and France planned a major landing at Alhucemas, consisting of some 13,000 soldiers, 11 tanks, and 160 aircraft, to attack the core rebel territory in early September. The Spanish Navy supplied , , four cruisers, the seaplane tender , and several smaller craft, with serving as the Spanish flagship. The French added the battleship , two cruisers, and several other vessels. Both fleets provided gunfire support as the ground forces landed on 8 September; the amphibious assault was a success, and after heavy fighting over the next two years, and by 1927 the last Rifian rebels surrendered to the allied troops.
Decommissioning and planned modernization