The high point of her career was the Argentine invasion of the Falkland Islands (Malvinas) in 1982, as part of Operation Azul. "Cabo San Antonio" disembarked with 20 LVTP7 tracked amphibious armoured personnel carriers and LARC-V transports from the 1st Amphibious Vehicles Battalion, carrying D and E Companies of the 2nd Marine Infantry Battalion at Yorke Bay. She did not participate further in the Falklands War once the Argentinian landings finished.