Operation Gardel was the codename given by the Peronist guerrilla organization Montoneros to the downing of a Lockheed C-130 Hercules, belonging to the 1st Air Brigade's 1st Transport Group as it took off from the old Teniente Benjamín Matienzo International Airport, carrying 114 Gendarmerie personnel as part of a military intervention in Tucumán province. Wikipedia