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During Operation Corporate in the 1982 Falklands War, Operation Keyhole was a British special operation on Thule Island on the South Sandwich Islands. The Operation took place from 19-20 June 1982. 10 prisoners (one civilian and nine military personal) were evacuated to the tanker OLMEDA, accompanied by HMS YARMOUTH. They departed for South Georgia. The Argentine Base URUGUAY was closed and the buildings sealed to make them weatherproof. The other ships of Operation Keyhole (ENDURANCE, SALVAGEMAN) followed and were back at Cumberland East Bay/South Georgia by 24 June 1982. During the operation KEYHOLE nobody was killed or injured.
A Royal Marines team were landed on Thule Island covertly to observe Argentine activities. The harsh conditions on the island with an air temperature of minus 20 degrees Celsius and a gale gusting to sixty miles per hour, the chill factor caused an effective drop to minus fity-two. Under the threat of the Royal Marines Party on the island and the ships cruising in front of the Argentine Base and several helicopters flying to the Argentine Base a white flag was raised. The ENDURANCE people who were forced to lower the Union Jack on South Georgia in 3 April hoisted now the Union Jack on Thule Island.
Coordinates: 59°27′S 27°18′W / -59.45, -27.3 (Operation Keyhole)
