Capitan de Corbeta Pedro Edgardo Giachino (Mendoza, 28 May 1947 – 2 April 1982, Port Stanley), was an Argentine Navy officer who became the first serviceman killed in action during the Falklands War.
Giachino was the leader of a platoon of Comandos anfibios and died of wounds in Stanley's hospital after the battle of Government House, which resulted in the surrender of Falklands' Governor Rex Hunt and the Royal Marines detachment during the Argentine invasion of 1982.
He was awarded posthumously the Argentine Nation to the Heroic Valour in Combat Cross and promoted to the rank of Captain.
He was first buried at Puerto Belgrano, but owing to a letter from his 13 year old daughter to President Raúl Alfonsín in 1985, his remains were moved to Mar del Plata, the hometown of his family. The naval base of Mar del Plata was also the headquarters of the forces he led in combat at the time of his death.
Alleged Human Right violations during the 1976 dictatorship
A number of witnesses' statements surfaced in 2011, accusing Giachino of being the commander of the illegal repression of militants in the area of Zárate-Campana, in northern Buenos Aires Province, between 1976 and 1977, during the dirty war. One of the main witnesses, former marine NCO Alfredo Molinari had several run ins with Giachino after being caught in possession of Karl Marx literature and later deserted his unit and took refuge in his parents house in Santiago del Estero.  Another of his accusers, Victor Basterra, a Montoneros guerrilla being held at the Navy Mechanics School in Buenos Aires, claimed in an interview that Giachino had been part of the security apparatus there. Circumstantial evidence also mentions him as being in charge of the external security of Mar del Plata's naval base, at a time when a part of the military facilities was used as a detention and interrogation center. His death prevents any further legal investigation, but the pressure of Human Rights groups compelled the City Council of Mar del Plata to remove his portrait from the chamber, where both the fallen soldiers from Mar del Plata and the local victims of the Argentine dictatorship are honoured. On 13 July 2011, retired commander Fernando María Azcueta (former San Luis submarine skipper that sortied against the Royal Navy in the Falklands War) announced that he would be returning the meritorious citizen diploma he received on the part of the Mar del Plata authorities, in protest at their decision to remove Giachino's portrait from the main hall. Fellow veterans that served in the San Luis and Santa Fe submarines also returned their awards as news spread in social media groups of Azcueta's decision.,
- "La primera víctima fatal argentina" El Día, 2 April 2007 (Spanish)
- Carlos Busser (1984). Operación Rosario (Informe oficial de la Marina Argentina) (in Spanish). Editorial Atlántida. p. 277. ISBN 950-08-0324-0.
- Capitán de Fragata Pedro E. Giachino Armada Argentina website (Spanish)
- “Un librito de Carlos Marx”, By Gustavo Veiga, Página/12, 10 July 2011
- La historia del represor reciclado, Página/12, By Susana Viau
- Argentine war heroes revealed to be henchmen in military dictatorship, The Washington Post, 9 April 2012
- El héroe que resultó represor Pagina 12, 10 July 2011 (Spanish)
- Los submarinistas del San Luis devuelven distinción al Concejo Deliberante de Mar del Plata
- Submarinistas de Malvinas devolverán “Mérito Ciudadano”