On this day: Dolly the sheep is cloned

Events, birthdays and anniversaries on 22 February

1997: In Roslin, Scotland, scientists announced that an adult sheep named Dolly had been successfully cloned. Picture: Jane Barlow

1724: Treaty of Stockholm between Sweden and Russia for mutual assistance was signed.

1759: French abandoned siege of Madras, India, on arrival of British fleet.

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1797: French forces landed in Britain at Fishguard, but were soon captured. No other foreign force has managed to invade Britain since.

1819: Florida was purchased by the United States from Spain.

1848: Revolt erupted in Paris due to failure of Louis Philippe’s reign.

1935: Actor Sir Cedric Hardwicke said Hollywood’s experiments with colour film would revolutionise the industry.

1942: It was announced that tribesmen in the Philippines had wiped out a Japanese regiment.

1945: United States Third Army crossed Saar River, south of Saarburg, Germany.

1946: Discovery of streptomycin was announced by Doctor Selman Waksman.

1955: Maureen Connolly, Little Mo, darling of Wimbledon, announced her retirement from competitive tennis to get married.

1957: The Duke of Edinburgh was formally granted the style and titular dignity of Prince of the United Kingdom in recognition of his ten years’ service to the country.

1972: IRA bomb killed seven people at Aldershot.

1974: Bangladesh’s independence was recognised by Pakistan.

1975: Military government of Ethiopia announced that 2,300 guerrillas had been killed in fighting in Eritrea.

1980: Ice skater Robin Cousins won figure skating gold medal at Lake Placid Olympics.

1982: Mercury given licence to operate telephones in competition with British Telecom.

1986: Philippines defence minister and the general who was to become armed forces chief broke with government of president Ferdinand Marcos.

1989: Peter de Savary, owner of Land’s End, bought the John o’ Groats House Hotel.

1990: Last Stalin statue toppled in Mongolian capital of Ulan Bator.

1991: Kenny Dalglish, veteran of a record 102 caps for Scotland, quit after five years as Liverpool player-manager.

1992: The United Nations Security Council voted to send 14,400 peace-keeping troops to Croatia – the first deployment of a United Nations peace force in Europe.

1994: United States president Bill Clinton ordered a full inquiry after top CIA agent Aldrich Ames and his wife were accused of having spied for the Soviet Union and Russia for nine years.

1997: In Roslin, Scotland, scientists announced that an adult sheep named Dolly had been successfully cloned.

2002: Angolan political and rebel leader Jonas Savimbi was killed in a military ambush.

2006: At least six men staged Britain’s biggest robbery, stealing £53 million from a Securitas depot in Tonbridge, Kent.

2011: An earthquake measuring 6.3 in magnitude struck Christchurch, New Zealand, killing 181 people.