In the Falklands, a ceasefire came into effect after it became clear to the Argentine command that there was nothing to be gained from continuing the fight. General Moore entered Port Stanley at 9.30 pm on 14 June (1.30 am on 15 June in BST) to sign the official Argentine surrender. The surrender was backdated to 8.59 pm (12.59 am BST) so that in the military's Zulu time (23:59) it had the same date of 14 June, to avoid confusion. British forces occupied Port Stanley on the morning of 15 June and disarmed the Argentine troops. The liberation of Thule and the South Sandwich Islands was completed by 20 June. The approximately 11,000 Argentine prisoners taken during the war were repatriated to Argentina by 14 July. The victory revived Thatcher's domestic popularity and was a key factor in her 1983 election win. Thatcher later stated that her Commons statement of 14 June was "perhaps the proudest moment of my life".