The Born brothers were kept in a known Argentine State Intelligence safehouse for nine months until their June 1975 release, something made possible without public suspicion of outside involvement by the agency's numerous contacts inside the Montoneros ( including the leader, Mario Firmenich ).

After Juan Perón's return from 18 years of exile and the 1973 Ezeiza massacre, which marked the definitive split between left and right-wing Peronism, the Montoneros were expelled from the Justicialist party in May 1974 by Perón.

The military lifestyle influenced all the actions, structure and hierarchy of the Montoneros, including salutes, uniforms and a constant usage of military slang, even in circumstances where such things were uncalled for ( such as the state funeral of Juan Perón ).

Although Juan Perón encouraged the actions of José López Rega, supported the right-wing unionists and denied preferential promotions to the Montoneros, they thought that his actions were simply a strategic masquerade, and that he actually supported the Montoneros ' projects.

In 1970, claiming to act in retribution for the June 1956 León Suárez massacre and Juan José Valle's execution, the Montoneros kidnapped and executed former dictator Pedro Eugenio Aramburu ( 1955 – 1958 ) and others who they said were his collaborators, such as unionists, politicians, diplomats, and businessmen.

In May 1974, the Montoneros were expelled from the Justicialist movement by Perón.

On 22 February 1975, in an ambush in the Lomas de Zamora suburb of Buenos Aires, three policemen ( First Sergeant Nicolás Cardozo, Corporal Roberto Roque Fredes and Constables Eugenio Rodriguez and Abel Pascuzzi ) were killed after their patrol car came under fire from Montoneros guerrillas.

At the same time, with the underground network of Montoneros militants largely uprooted in the capital of Tucumán province, several hundred ERP militants took the streets in the Argentine city of Córdoba in the last week of August 1975, in an effort to divert attention from the military operations being waged in the jungles and mountains of Tucumán and five policemen were killed as a result, after the police headquarters was attacked with gunfire and the police radio communications center bombed.

In the aftermath, a second lieutenant ( Ricardo Massaferro ), a sergeant ( Víctor Sanabria ) and ten soldiers ( Antonio Arrieta, Heriberto Ávalos, José Coronel, Dante Salvatierra, Ismael Sánchez, Tomás Sánchez, Edmundo Sosa, Marcelino Torantes, Alberto Villalba and Hermindo Luna ) were killed and several wounded ; the Montoneros lost 16 men in the fighting and mop-up operations that night.

Under the presidency of Nestor Kirchner, the families of all the Montoneros killed in the attack were later compensated with the payment of around US $ 200, 000 each.

While the ERP fought the army in Tucumán, the Montoneros were active in Buenos Aires.

On 2 February 1976 about fifty Montoneros attacked the Juan Vucetich Police Academy in the suburb of La Plata but were repelled when the police cadets fought back and reinforcements arrived.

The ERP guerrillas and their supporting network of militants came under heavy attack in April 1976, and the Montoneros were forced to come to their assistance with money, weapons and safe houses. On 21 June 1976, the Labour Relations Manager of Swift ( an American food processing company ), Osvaldo Raúl Trinidad is shot and killed outside his home in the La Plata suburb of Buenos Aires after coming under fire from a car load of masked peronist guerrillas.

On 9 November, eleven police officers were wounded when a Montoneros bomb exploded at the police headquarters of La Plata during a meeting of the Buenos Aires police chiefs.

On 5 September 1977 five Montoneros confessed to the killing of the child, four of them were later murdered while held in a prison camp in La Plata.

On 14 August 1977 Susana Leonor Siver and her partner Marcelo Carlos Reinhold, both Montoneros fighters, were kidnapped from Reinold's mother home along with a friend by a fifteen-strong naval intelligence team and taken to the ESMA naval detention camp.

Adriana and Gaspar Tasca, both identified as Montoneros, were taken into custody between 7 and 10 December 1977 and remain unaccounted for.

On 6 October 1978, José Pérez Rojo and Patricia Roisinblit, both Montoneros members, were made to disappear.

The Montoneros admit 5, 000 of their guerrillas were killed.

The Montoneros were effectively finished off by 1977, although their " Special Forces " did fight on until 1981.

Among the Montoneros killed in this operation were Luis Francisco Goya and María Lourdes Martínez Aranda who after crossing the Chilean border into Argentina were abducted in the city of Mendoza in 1980 and never seen again, with their son Jorge Guillermo being adopted and raised by an army NCO, Luis Alberto Tejada and his wife Raquel Quinteros.

It was inspired by other South American urban guerrilla groups, such as the Tupamaros in Uruguay and the Montoneros in Argentina.

On September 19, 1974, however, the consortium was shaken by the kidnapping of siblings Jorge and Juan Born by the far-left terrorist group, Montoneros.

The internal structure of the Montoneros was completely top-down, with the strategies outlined by the heads of it and ordered to the others.

" The Montoneros took their name from the pejorative term used by the 19th-century elite to discredit the mounted followers of the popular caudillos.

The Montoneros initiated a campaign to destabilize by force what they deemed a pro-American regime.

In April 1973, Colonel Héctor Irabarren, head of the 3rd Army Corps ' Intelligence Service, was killed when resisting a kidnap attempt by the Mariano Pojadas and Susana Lesgart Platoons of the Montoneros.

The Montoneros financed their operations by kidnapping and collecting ransoms for businessmen or executives, making as much as $ 14. 2 million in a single abduction of an Exxon executive in 1974.

On 26 August 1975, 26-year-old Fernando Haymal is killed by fellow Montoneros for allegedly cooperating with government forces.

The Montoneros tried to disrupt the World Cup Soccer Tournament being hosted in Argentina in 1978 by launching a number of bomb attacks.

During the Falklands War against Great Britain, the Argentine military conceived the aborted Operation Algeciras, a covert plan to support and convince some Montoneros, by appealing to their patriotism, to sabotage British military facilities in Gibraltar.

* Soldiers of Perón: Argentina's Montoneros, by Richard Gillespie ( 1982 ).

In 1974, two third-generation family members, Jorge and Juan Born, were kidnapped by the Montoneros guerrilla group and recovered only after the payment of a $ 60m ransom.

Perón had long been inimical to the left, but had cultivated their support while in exile ; this rapport ended after the assassination of CGT leader José Ignacio Rucci by the leftist Montoneros, however.

Following a string of political murders, a break by the Montoneros with the government, and a wave of industrial strikes in September, 1974, she became unpopular for the first time since the public had become acquainted with her.

Left-wing Peronism was represented by many organizations, from the Montoneros and the Fuerzas Armadas Peronistas to the Peronist Youth, the Frente Revolucionario Peronista and the Revolutionary Peronist Youth, passing by Peronismo en Lucha or Peronismo de Base, which supported a Marxist viewpoint.

In 1970, one of the leaders of the 1955 coup, Pedro Eugenio Aramburu was kidnapped and killed by the Peronist guerilla Montoneros, in its first claimed military action.

Then, a comprehensive and documented effort by British historian Richard Gillespie titled Montoneros, Soldados de Perón was widely read and contributed to cement a non-romantic image of Montoneros.

During the 1980s a captured Sandinista commando revealed that Montoneros " Special Forces " were training Sandinista frogmen and conducting gun runs across the Gulf of Fonseca to the Sandinista allies in El Salvador, FMLN guerrillas.

On September 25 a Montoneros commando allegedly killed José Ignacio Rucci, Secretary-General of the CGT National trade union center and Perón's good friend.

The next years were blemished by often bloody internal disputes and the fight against the leftist Montoneros, however, and in September 1973, a commando killed Secretary-General Rucci.