Franco came to power during the Spanish Civil War, which pitted a government of democrats, anarchists, socialists, and communists, supported by the Soviet Union and international volunteers, against a rebellion of conservatives, monarchists, nationalists, and fascists, supported by both Hitler and Mussolini, with the rebels ultimately winning. Franco's authoritarian government remained dominant in Spain until the 1960s. With Franco's increasing age, left-wing protests increased, while at the same time, the far right factions demanded the return of a hardline absolute monarchy. At the time, the heir to the throne of Spain was Infante Juan, Count of Barcelona, the son of the late Alfonso XIII. However, General Franco viewed him with extreme suspicion, believing him to be a liberal who was opposed to his regime. Juan Carlos's first cousin Alfonso, Duke of Anjou and Cádiz was also briefly considered as a candidate. Alfonso was known to be an ardent Francoist and married Franco's granddaughter, Doña María del Carmen Martínez-Bordiú y Franco in 1972. Ultimately, Franco decided to skip a generation and name Juan de Borbón's son, Prince Juan Carlos, as his personal successor. Franco hoped the young prince could be groomed to take over the nation while still maintaining the ultraconservative and authoritarian nature of his regime. In 1969, Juan Carlos was officially designated heir-apparent and was given the new title of Prince of Spain (not the traditional Prince of Asturias). As a condition of being named heir-apparent, he was required to swear loyalty to Franco's Movimiento Nacional, which he did with little outward hesitation. His choice was ratified by the Spanish parliament on 22 July 1969. Juan Carlos met and consulted Franco many times while heir apparent and often took part in official and ceremonial state functions, standing alongside the dictator, much to the anger of hardline republicans and more moderate liberals, who hoped that Franco's death would bring in an era of reform. During 1969–1975, Juan Carlos publicly supported Franco's regime. Although Franco's health worsened during those years, whenever he did appear in public, from state dinners to military parades, it was in Juan Carlos's company. Juan Carlos continued to praise Franco and his government for the economic growth and positive changes in Spain. However, as the years progressed, Juan Carlos began meeting secretly with political opposition leaders and exiles, who were fighting to bring liberal reform to the country. He also had secret conversations with his father over