Its immediate predecessor was Operation Independence. It was ordered in early 1975 by the constitutional government of the province of Tucumán, located in the northern region of the country, which happened to be the epicenter of the policy of clandestine detention, torture, and forced disappearance that would be later implemented across the entire country.
To put repression into practice, the Military Junta –made up of the Army, the Navy, and the Air Force– divided the country into five zones, each controlled by different Army units. The State Intelligence Secretariat, along with military and police intelligence departments played a crucial role in the persecution of individuals. Clandestine detention centers were the backbone of the system. In all, there were 814 detention centers established in military and police premises and other agencies’ facilities. Thousands of people were kidnapped and taken there by the Armed Forces and the Police. Most of them were murdered, with very few surviving. According to the estimates, approximately 30,000 political activists, union leaders, students, workers, journalists, members of armed and/or grassroots organizations fell victim to this repression.