President Cristina Fernandez has reaffirmed Argentina's claim to the Falkland Islands.
During a ceremony to mark the 30th anniversary of the Falklands war, Ms Fernandez said it's absurd that Britain retains a colonial enclave in the South Atlantic.
British prime minister David Cameron said that he remained committed to upholding British sovereignty over the islands.
''That was the fundamental principle that was at stake 30 years ago: and that is the principle which we solemnly reaffirm today,'' he said.
British veterans of the war and relatives of those who died paid their respects at the National Memorial arboretum in Staffordshire on Monday.
A candle was lit to mark the anniversary. The BBC reports it will remain alight for 74 days - the length of the conflict.
A total of 255 British servicemen and about 650 Argentines died after Britain sent a task force following the Argentine invasion on 2 April 1982.
Britain has controlled the Falklands since 1833, but Argentina claims the territory, saying it inherited rights to the Malvinas from Spain.
Meanwhile, the Royal Navy has confirmed one of its newest warships, HMS Dauntless will leave on Wednesday for a six-month routine deployment in the South Atlantic.