del Plata and named it National Universitary Concentration (Spanish: Concentración Nacional Universitaria). The main leaders were Delgado, Piantoni, and law students Raúl Viglizzo and Oscar Héctor Corres. Corres was also part of the police force and served as a link between Disandro and Patricio Fernández Rivero, head of the CNU in La Plata. The organization had ties to union leaders including José Ignacio Rucci and Lorenzo Miguel. On November 20, 1971, the anniversary of the Battle of Vuelta de Obligado, CNU held a demonstration in Mar del Plata, where they burned desks, dropped Molotov cocktails, and smashed shop windows. Murder of Silvia Filler CNU carried out its first murder on December 6, 1971, when Silvia Filler [es], a 17-year-old student at Mariano Moreno National College, was shot on the campus of the National University of Mar del Plata. A court ruled that 20 CNU members were responsible for Filler's death. They were prosecuted but not convicted. The 1973 amnesty law allowed for their release. Incorporation into state apparatus After the collapse of the Argentine Revolution dictatorship, the democratically elected government of Héctor José Cámpora assumed power on May 25, 1973. A coalition of various political groups, Cámpora's government worked to replace the personnel that the military dictatorship had appointed in command of Argentine state institutions (universities, hospitals, media, etc.). In the process, CNU was incorporated into the government apparatus to carry out state terrorism. In Mar del Plata, CNU and the Nationalist Liberation Alliance took over radio station Radio Atlántica [es] and gave it to General Juan José Valle. On June 20, 1973, the Ezeiza massacre marked the start of a decade characterized by state terrorism against the Peronist left. Two months later, the leftist Peronist Armed Forces (abbrev. FAP) murdered Marcelino Mansilla [es], a Mar del Plata union leader. The FAP claimed that the assassination of Mansilla, who had strong ties to the CNU, was a reprisal for Silvia Filler's death. Investigation and Trial In 2008, CNU leaders were tried on Crimes against Humanity. Demarchi fled to Colombia and filed for asylum, but was soon denied asylum and extradited to Argentina in 2013. Reference Dirty War Peronism Terrorism in Argentina Political repression in Argentina National Reorganization Process Political movements in Argentina Far-right politics in Argentina History of Argentina (1973–1976) Paramilitary organisations based in Argentina Counterterrorism in Argentina Anti-communism in Argentina