Lacking a Vice President, the post of acting President of Argentina fell to Lúder, whose brief tenure would later be remembered chiefly for his signing of Decrees 2770-2772, which created a "Council for Internal Security", in response to Operation Primicia, a guerrilla attack carried out by Montoneros on a military barracks at Formosa Province. The measure, combined with prior ones, was successful in quelling an insurgent campaign led by the leftist ERP in Tucumán Province, though it in practice extended a state of siege nationwide.
