The 25th Regiment was a member of Group B that traveled to the Tucumán province by order of the Commanding General of the Army to reinforce the V Infantry Brigade that carried out Operation Independence.
First Lieutenant Esteban, told Argentine military historian Isidoro Jorge Ruiz-Moreno “My men were never forced to stay in their wet foxholes except when there was an air raid or when the battle came closer.
But before the English landed, I made sure that my troops were warm, safe and well fed.”[3] On 1 May, a Sea Lynx assisting the Royal Navy ships in their bombardment of the Port Stanley defenders was taken by surprise by Second Lieutenant Guillermo Eduardo Laferriere's rifle platoon from the 25th Regiment that had been sent to Beagle Ridge and was reportedly hit by machine-gun fire.
[7] C Company suffered heavy casualties on Darwin Ridge and Goose Green Airbase, but forced the British attackers to withdraw twice in the battle before the Argentines surrendered.
The Commanding Officer of 2 PARA, Lieutenant-Colonel Herbert Jones was killed on the hillside of Darwin Ridge by Corporal Osvaldo Faustino Olmos[8](a specialist sniper) from 'Boat Platoon' (Sección Bote) of the 25th Regiment although other versions say he was gunned down by two conscripts from the same rifle platoon, the OAR (Aspirante a Oficial de Reserva or Reserve Officer Trainees) Jorge Oscar Ledesma (machine-gunner) and Guillermo Nelson Huircapán (FAL rifleman and assistant-gunner).
[11] In his book Malvinas: Un Sentimiento (Editorial Sudamericana, 1999), Seineldín says that it was the Army Green Berets in 601 and 602 Commando Companies who urged him take charge of the Port Stanley garrison, which he rejected.
British authors Max Hastings and Simon Jenkins in The Battle for the Falklands (Norton, 1983) wrote the following: "The Calvi report prepared by the Army after the war even suggests that a mutiny was plotted to replace Menéndez with Colonel Mohamed Alí Seineldín, from the 25th Infantry Regiment."
On the night of 13–14 June, the 25th (Ranger-type) Regiment deployed a mixed company force (under First Lieutenant Miguel Angel Machi) to halt the British advance at Moody Brook.
In all, 35 conscripts and regulars were decorated, including many of the fallen and wounded, like Lieutenant Roberto Néstor Estévez, a platoon commander killed during the Battle of Goose Green.