Capitan de Corbeta Pedro Edgardo Giachino (28 May 1947 – 2 April 1982), was an Argentine Navy officer who became the first serviceman killed in action during the Falklands War.

[2] He was awarded posthumously the Argentine Nation to the Heroic Valour in Combat Cross and promoted to the rank of captain.

[3] 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.

[5][6] 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.

[7] On 13 July 2011, retired commander Fernando María Azcueta (former submarine ARA San Luis 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.