| Date | 2 May 1982 |
| Location | South Atlantic Ocean, 36 nautical miles south of the Total Exclusion Zone |
| Caused by | British War Cabinet authorisation to attack the Belgrano task group on grounds it threatened the British carrier group, issued while the vessel was withdrawing under Peruvian ceasefire conditions |
| Resulted in | Sinking of ARA General Belgrano; 323 Argentine sailors killed; withdrawal of Argentine surface fleet for the remainder of the Falklands War; collapse of Peruvian peace initiative |
| Parties | Royal Navy · Argentine Navy |
| Lead figures | Commander Christopher Wreford-Brown, General Leopoldo Galtieri, Margaret Thatcher, Tam Dalyell |
The Sinking of the ARA General Belgrano was a naval engagement on 2 May 1982 in the South Atlantic Ocean, approximately 36 nautical miles south of the Total Exclusion Zone established by the British government during the [Falklands War](/wiki/falklands-war-1982). The Argentine cruiser *ARA General Belgrano* was struck by two torpedoes fired from the British nuclear-powered submarine HMS *Conqueror*, resulting in the loss of 323 Argentine sailors — the single largest loss of life in the conflict — and the effective withdrawal of the Argentine surface fleet for the remainder of hostilities.
By late April 1982, the [Falklands Conflict](/wiki/falklands-conflict) had escalated rapidly following the Argentine military junta's seizure of the Falkland Islands on 2 April. The [Argentine Military Junta 1976–1983](/wiki/argentine-military-junta-1976-1983), under General Leopoldo Galtieri, had authorised the naval task group centred on the *Belgrano* — a veteran American-built cruiser originally commissioned as USS *Phoenix* in 1938 — to conduct operations in the southern approaches to the islands. The British government, under Prime Minister Margaret Thatcher, had declared a 200-nautical-mile Total Exclusion Zone around the Falklands effective from 30 April, within which any Argentine vessel was declared a legitimate target.
The *Belgrano* was accompanied by two destroyers, *ARA Hipólito Bouchard* and *ARA Piedra Buena*, and had been ordered by Argentine naval command in Buenos Aires to steam westward, away from the exclusion zone, following a signal received at 11:00 local time on 2 May indicating that a negotiated ceasefire brokered through Peru was imminent. This instruction to withdraw — confirmed in declassified Argentine naval communications released in 1994 — was the operative order in effect at the time HMS *Conqueror* received authorisation to fire.
### Morning, 2 May
HMS *Conqueror*, under the command of Commander Christopher Wreford-Brown, had been tracking the *Belgrano* task group for approximately 30 hours before the engagement. The submarine shadowed the group at a depth of 80 feet, maintaining a position off the port quarter of the cruiser as it conducted its westward course. At 13:00 London time (10:00 local), the War Cabinet in London, convened at Chequers, authorised an attack on the *Belgrano* group on the grounds that it posed a threat to HMS *Sheffield* and other vessels of the British carrier group — a justification later disputed in the House of Commons by opposition MP Tam Dalyell, whose persistent questioning constituted one of the most sustained parliamentary challenges of the Thatcher era.
### Attack and Sinking
At 15:57 local time, HMS *Conqueror* fired three Mk 8 torpedoes — a weapon of Second World War vintage — from a range of approximately 1,400 yards. Two of the three torpedoes struck the *Belgrano*: one forward of the bow, one amidships. The ship listed severely to port within minutes. The order to abandon ship was given at 16:24, and the *Belgrano* sank at 17:00, approximately 56 minutes after the attack. Cold water temperatures in the South Atlantic and the destruction of several life rafts by the initial explosions contributed significantly to the death toll. Of the 1,093 personnel aboard, 770 were rescued over the following 36 hours by Argentine vessels, including the hospital ship *ARA Bahía Paraíso*.
In Argentina, the sinking prompted the withdrawal of the entire surface fleet to within the 12-nautical-mile coastal exclusion zone, where it remained for the duration of the conflict. The Argentine navy did not conduct further blue-water operations. In Britain, the tabloid newspaper *The Sun* published its front page headline "GOTCHA" on 4 May, a response that drew immediate condemnation from within the British press and was subsequently cited by the [Press Complaints Commission](/wiki/press-complaints-commission) in its 1983 review of wartime editorial conduct. Two days after the *Belgrano* sinking, HMS *Sheffield* was struck and set ablaze by an Argentine Exocet missile, killing 20 British sailors, in what many commentators described as a direct operational consequence of the escalation.
The [South Atlantic Sovereignty Dispute](/wiki/south-atlantic-sovereignty-dispute) entered a new and unambiguously military phase following 2 May. Diplomatic efforts coordinated through the United Nations Secretary-General Javier Pérez de Cuéllar, and through the earlier Peruvian peace initiative of President Fernando Belaúnde Terry, collapsed within 48 hours of the sinking. The Argentine government formally broke off peace negotiations on 4 May, citing the attack on a vessel that was, by their account, withdrawing under ceasefire conditions.
The sinking of the *Belgrano* remains among the most debated single engagements in post-war British military history. The central controversy — whether the British War Cabinet knowingly ordered the attack on a retreating vessel in order to derail the Peruvian peace initiative — was examined in detail in parliamentary proceedings and in Tam Dalyell's 1982 publication *One Man's Falklands*. The Franks Report of January 1983, commissioned by the Thatcher government, concluded that the decision to attack was militarily justified given the *Belgrano*'s capacity to threaten the British task force, a conclusion that critics argued addressed the operational question while leaving the diplomatic one unanswered.
The [Trial of the Juntas 1985](/wiki/trial-of-the-juntas-1985) in Argentina, which prosecuted members of the [Argentine Military Junta 1976–1983](/wiki/argentine-military-junta-1976-1983) for crimes committed during the [Dirty War](/wiki/dirty-war-argentina), did not encompass the naval conduct of the Falklands campaign; however, the *Belgrano* families' association — formed in 1983 — pursued a separate civil claim through Argentine courts for two decades. The [Madres de Plaza de Mayo](/wiki/madres-de-plaza-de-mayo) publicly commemorated the *Belgrano* dead alongside their own disappeared, noting the overlap in dates between the conflict and the final year of the junta's internal repression. The [Nunca Más Report](/wiki/nunca-mas-report), published in 1984, referenced the *Belgrano* sinking in its introduction as emblematic of the junta's willingness to expend Argentine lives without military rationale.
The wreck of the *ARA General Belgrano* lies at a depth of approximately 4,200 metres. It has not been surveyed.
The sinking has been referenced in numerous works of British and Argentine literature and film. The 1983 BBC documentary *Sailor: The *Belgrano* Files* drew 4.2 million viewers on its first broadcast. Argentine novelist Rodolfo Fogwill wrote his novel *Los Pichiciegos* — widely regarded as the defining Argentine literary response to the Falklands War — during a single cocaine-fuelled weekend in May 1982, reportedly completing the manuscript before the conflict had ended. The ship itself appeared as a dramatic subject in [Operation Black Buck](/wiki/operation-black-buck) retrospectives, though the two events were operationally unrelated. In 2003, the Argentine government designated 2 May as the Day of Veterans and the Fallen of the Falklands War (*Día del Veterano y de los Caídos en la Guerra de las Malvinas*), a national public holiday observed annually.