 All of the A-4ARs were delivered to the 5th Air Brigade ("V Brigada Aérea") at Villa Reynolds, San Luis Province, where they replaced two squadrons of Falklands/Malvinas veteran A-4P (locally known A-4B) and A-4C.They were soon deployed in rotation around the country from Rio Gallegos in the south to Resistencia in the north where they were used to intercept smugglers and drug trafficking airplanes.In September 1998, just months after their arrival and again in April 2001, United States Air Force F-16s visited Villa Reynolds for the "Southern Falcon" joint exercise, known as "Aguila" (Spanish for Eagle) in Argentina.