The commander of this unit in the Falklands War was 34-year-old Major Mario Castagneto. The Company was divided in three assault sections. The first elements of 601 Commando Company arrived on 24 April, spending their first night in the former Royal Marine Moody Brook Barracks along with several regimental commanders that had earlier on attended a briefing in the building. Fearing that British had established an Observation Post on Tussock Island, near Stanley Airfield, Major Mario Castagneto's 601 Commando Company was sent to clear the island of enemy special forces in early May, but returned empty handed and completely covered in black soot due to an earlier supporting Pucara bombing mission with napalm. In the first week of May, 601 Commando Company was also sent in helicopters to sweep Salvador Settlement in search of British special forces, after it was established that Robin Pittaluga had been communicating with the British task force sent to recover the Falklands. Robin and his son Saul were questioned at gunpoint and their radio confiscated with Robin taken to Port Stanley for further questioning and placed under house arrest there for the remainder of the war. On 21 May, the Blowpipe surface-to-air missile team of the 1st Assault Section under Lieutenant Sergio Fernández shot down a RAF Harrier GR3 piloted by Lieutenant William Glover at Port Howard that morning and damaged a RN Sea Harrier FRS1 piloted by Lieutenant Steve Thomas that afternoon with another shoulder-launched Blowpipe SAM. On the night of 6/7 June, Captain Rubén Teófilo Figueroa's 2nd Assault Section attacked the British patrol base near Murrell Bridge, northwest of Stanley, which was protected by Sergeant Ian Addle's patrol from Captain Matthew Selfridge's D Company of the 3rd Battalion of the Parachute Regiment, at the approximated position. After a gun-battle lasting some 40 minutes, the British abandoned the outpost under heavy mortar fire, leaving behind much of their equipment. The outcome of this engagement compelled the British to set patrol bases closer to their own lines. According to the British official version of events: Corporal Ned Kelly from 3 PARA's B Company reports coming under mortar fire: Private Colin Charlton from Corporal Peter Higg's Close-Target-Reconnaissance Patrol from D Company claims the soft peat absorbed much of the deadly fire: According to Private Mark Hunt from D Company: On the night of 7–8 June, the 3rd Assault Section under Captain Jorge Eduardo Jándula took up ambush positions near the abandoned British positions, but no further contact took place between 3 PARA's D Company and 601 Commando Company. On 10 June, a 4-man patrol under Lieutenant José Martiniano Duarte from the 1st Assault Section operating in West Falkland bumped into part of Captain Gavin Hamilton's 19 Mountain Troop, D Squadron, 22nd Special Air Service Regiment. The SAS observation post on Many Branch Ridge reportedly split into two pairs with Captain Hamilton and his signaller, Corporal Roy Fonseca, covering the escape of the second pair, before Hamilton was killed and Fonseca was captured. According to Major Cedric Delves from the SAS's D Squadron: On the night of 13–14 June, the 3rd Assault Section under Captain Negretti was entrusted with the all round defence of Stanley House, a task the Argentine Army Green Berets bitterly resented, preferring action in the frontlines. During the Battle of Wireless Ridge, command and controlbroke down in the 7th Infantry Regiment and the Green Berets from the 2nd Assault Section were instructed to restore order and shoot on sight British SAS Commandos believed to have infiltrated the retreating Argentine companies.
Battle of La Tablada Barracks
In late January 1989, heavily armed leftist guerrillas from the All For The Fatherland Movement captured the 3rd Mechanized Infantry Regiment Barracks in the La Tablada suburb of Buenos Aires. In the ensuing 1989 attack on La Tablada barracks, 601 Commando Company helped recover the barracks in Close quarters combat, but lost two killed, Lieutenant Ricardo Alberto Rolón and Sergeant Ramón Wladimir Orué in the process.
