Pebble Island
Immediately after the Argentinians had seized the Falkland Islands they established a small airbase, Aeródromo Auxiliar Calderón, on Pebble Island (Argentine name: isla Borbón) using the local airstrip on which were based Argentine Air Force's FMA IA 58 Pucará and some Argentine Naval Aviation's T-34 Mentor light ground attack aircraft. Reconnaissance by these aircraft could have compromised the Royal Navy's manoeuvres before its intended landing on East Falkland.