On the night of 1–2 April 1982, "Santísima Trinidad" halted off Mullet Creek and lowered 21 Gemini assault craft into the water. They contained 84 special forces troopers of Lieutenant-Commander Guillermo Sánchez-Sabarots's 1st Amphibious Commandos Group and a small party under Lieutenant-Commander Pedro Giachino, who was second-in-command of the 1st Marine Infantry Battalion and had volunteered for the mission to capture Government House. Argentine Rear Admiral Jorge Allara, through a message radioed from "Santisima Trinidad", had requested from Rex Hunt a peaceful surrender, but the request was rejected.