On 6 June 1982, during the Falklands War, the British Royal Navy Type 42 destroyer HMS Cardiff engaged and destroyed a British Army Gazelle helicopter, serial number XX377, in a friendly fire incident, killing all four occupants. Cardiff, on the lookout for aircraft flying supplies to the Argentine forces occupying the Falkland Islands, had misidentified the helicopter as an enemy C-130 Hercules. Although the helicopter's loss was initially blamed on enemy action, a subsequent inquiry found Cardiff's missiles to be the cause.