Sovereignty over the Falkland Islands (Islas Malvinas in Spanish) is disputed between Argentina and the United Kingdom. The British claim to sovereignty dates from 1690, and the United Kingdom has exercised de facto sovereignty over the archipelago almost continuously since 1833. Argentina has long disputed this claim, having been in control of the islands for a period prior to 1833. The dispute escalated in 1982, when Argentina invaded the islands, precipitating the Falklands War.