Illia was deposed by a new military coup in June 1966, the "Argentine Revolution". Alfonsín was detained while trying to hold a political rally in La Plata, and a second time when he tried to re-open the UCRP committee. He was forced to resign as a deputy in November 1966. He was detained a third time in 1968 after a political rally in La Plata. He also wrote opinion articles in newspapers, under the pseudonyms Alfonso Carrido Lura and Serafín Feijó. The Dirty War began during this time, as many guerrilla groups rejected both the right-wing military dictatorship and the civil governments, preferring instead a left-wing dictatorship aligned with the Soviet Union, as in the Cuban Revolution. Alfonsín clarified in his articles that he rejected both the military dictatorship and the guerrillas, asking instead for free elections. The UCRP became the UCR once more, and the UCRI was turned into the Intransigent Party. Alfonsín created the Movement for Renewal and Change within the UCR, to challenge Balbín's leadership of the party. The military dictatorship finally called for free elections, allowing Peronism (which had been banned since 1955) to take part in them. Balbín defeated Alfonsín in the primary elections but lost in the main ones. Alfonsín was elected deputy once more.