Commanded by Marine Commander Carlos H. Robacio, BIM-5 took part in the defence of Mount Tumbledown in the 1982 Falklands War. Although made up by conscripts, the unit's core of highly-professional NCOs and commissioned officers, along with a well-developed training and logistics system, rendered BIM-5 a tough unit that fought well in defense during the Battle of Mount Tumbledown. Different Argentine authorities have repeatedly decorated BIM-5's colors, with the French awarding Marine Admiral Robacio the French Légion d'Honneur and the Argentine government awarding him the Argentine Nation to the Valour in Combat Medal.