Liberating Revolution Period

The Liberating Revolution Period began with the collapse of Juan Perón’s government in 1955 and the military regime that promised to eradicate Peronism. It transformed Argentina’s political landscape through arrests, dismissals, and the suppression of Peronist symbols, but did not immediately bring Nazi fugitives to justice. For them, Perón’s fall meant the loss of a protector and the beginning of new uncertainty; for those pursuing them, the period revealed how political change and legal accountability could move at very different speeds.

The fall of Perón and the new order

On 16 June 1955, anti-Peronist military leaders bombed the presidential palace and May Square. Juan Perón survived, but his authority was already under pressure from an opposition that included the Church and the armed forces. In September, after a naval blockade and threats against the country’s refineries, he resigned and fled aboard a Paraguayan gunboat bound for Asunción. A military junta took power; within weeks, Pedro Eugenio Aramburu replaced its first leader and pledged to purge the country of Peronism.

Aramburu’s campaign reached beyond the removal of the former president. His government prohibited public displays of Perón and Eva Perón and penalized the public use of Peronist names and political expressions. Union leaders were arrested and thousands of officials dismissed. Places named after Perón were renamed, while Eva Perón’s foundation was closed and its property dispersed or destroyed. The regime’s effort to erase the previous order thus operated through both state institutions and the visible symbols of everyday life.

Political change and Nazi fugitives

Perón’s departure unsettled the Nazi exiles who had found room to operate in Argentina. Companies supported by German capital faced closure; police searched Hans-Ulrich Rudel’s home in Córdoba and placed him under house arrest, while some war criminals left the country. Josef Mengele, who had avoided politics and was not part of Perón’s inner circle, initially chose to remain. He stopped performing illegal abortions and waited to see whether the new government would leave him alone.

That calculation did not last. In 1956, Mengele obtained a three-month passport and left Argentina for Geneva, traveling by way of New York. The transition had made his situation less secure, but his departure was not itself a prosecution: the political disruption prompted flight before the legal process against him had taken shape. Later, Argentina’s political and legal institutions would again become part of the pursuit, but the growing number of jurisdictions involved also created opportunities for delay and evasion.

Arrest warrants and the obstacles to extradition

In 1959, after Hermann Langbein assembled evidence and pressed the authorities to act, a prosecutor in Freiburg im Breisgau issued an arrest warrant for Mengele on charges of multiple murders and attempted murders. The case had first been referred to the German federal justice minister, who held that it belonged before a regional court; most judges declined to proceed. Langbein then urged the Ministry of Foreign Affairs to seek Mengele’s extradition from Argentina.

The subsequent requests moved through multiple offices and political channels. As reports spread that Mengele had fled to Paraguay, West German and Argentine procedures lagged, while diplomatic officials delayed. Paraguay’s authorities learned that an extradition request was coming, but Rudel intervened on Mengele’s behalf. In November 1959, Mengele obtained Paraguayan citizenship, a residence permit, a certificate of good behaviour, and an identity card, despite not meeting the stated five-year residency requirement. Citizenship and national sovereignty became practical barriers to extradition, not simply formal details.

The pursuit remained uneven in the following years. After Adolf Eichmann was kidnapped in 1960, the hunt for Nazi fugitives intensified, and Mengele’s arrest warrant was issued on 20 June. Yet West Germany devoted few special resources to locating him. Its authorities were slow to circulate fingerprints and relied on diplomatic channels; in 1962, Paraguay refused an extradition request, and in 1963 a promised aid bounty of ten million US dollars did not change that position. In 1964, West German officials publicly identified Mengele as a Paraguayan citizen believed to be living near the tri-border region and traveling to Brazil. Paraguay rejected pressure to strip him of his citizenship, invoking its sovereignty. The episode showed how a warrant could establish a legal basis for pursuit without ensuring cooperation or capture.

From political upheaval to public memory

The period’s importance extends beyond the immediate struggle between Peronists and the new military government. Perón’s fall altered the circumstances of Nazi exiles, but the later pursuit of Mengele depended on a wider network of investigators, survivors, courts, diplomats, and governments. The slow extradition process stood in contrast to the growing public demand that the crimes of Auschwitz be confronted. In 1985, survivors, including former twins and other victims of Mengele’s experiments, testified at a mock trial at Yad Vashem in Jerusalem. The proceedings renewed international pressure for his arrest; the United States, Israel, and West Germany coordinated efforts and announced substantial rewards.

That later campaign did not resolve the failures of the 1950s and 1960s, but it made their consequences newly visible. The Liberating Revolution had dismantled Peronist institutions and unsettled the sanctuary available to some Nazi fugitives, yet political rupture alone could not overcome bureaucratic delay, weak enforcement, and competing claims of sovereignty. The contrast between the government’s forceful suppression of Peronist symbols and the protracted pursuit of a fugitive accused of mass murder marks the period’s central tension: a state could rapidly reshape public political life while transnational justice remained slow and uncertain.