As one of the vessels committed to Operation Corporate, the 1982 Falklands War, Fearless, fitted with modern satellite communications equipment, hosted the staff of the amphibious force commander Commodore Amphibious Warfare (COMAW), Commodore Michael Clapp and Commanding Officer 3 Commando Brigade, Brigadier Julian Thompson and his staff, as well as elements of the landing force.
She was placed out of commission for three years in 1985 prior to a two year refit at Devonport, and recommissioning in 1991