Argentina's military junta hoped to restore its support at a time of economic crisis, by reclaiming sovereignty of the islands. It said it had inherited them from Spain in the 1800s and they were close to South America.
The UK, which had ruled the islands for 150 years, quickly chose to fight. Prime Minister Margaret Thatcher said the 1,800 Falklanders were "of British tradition and stock". A task force was sent to reclaim the islands, 8,000 miles away.
In the fighting that followed, 655 Argentine and 255 British servicemen lost their lives, as did three Falkland Islanders. ( BBC)