Oct. 13, 1925
Born Margaret Roberts in Grantham, central England.
A plaque is displayed on the wall of the birthplace and childhood home of former British Prime Minister Margaret Thatcher.
June 1, 1947
Graduates from Oxford with a chemistry degree.
Dec. 13, 1951
Marries Denis Thatcher, a wealthy oil executive.
Aug. 15, 1953
Gives birth to twins, Mark and Carol.
Oct. 8, 1958
Elected to Parliament.
June 20, 1970
Becomes education secretary.
Feb. 11, 1975
Elected leader of the Conservative Party.
British Conservative Party leader Margaret Thatcher, then 49, posing in the kitchen of her Chelsea home in London following her election at the head of the Tory.
May 3, 1979
Wins national elections, becomes prime minister.
Margaret Thatcher waving as she arrives to take office at 10 Downing Street in London.
April 5, 1982
Chairs War Cabinet, authorizing a naval force to retake the Falkland Islands after an Argentine invasion.
June 14, 1982
Argentina surrenders at the Falklands Islands, contributing to Thatcher’s reelection.
Margaret Thatcher tours the Falkland Islands in 1983.
June 9, 1983
Wins second term.
Aug. 1, 1986
Cabinet unanimously supports her resistance to sanctions against South Africa.
June 11, 1987
Wins third term.
Jan. 3, 1988
Becomes Britain's longest continuously serving prime minister of 20th century.
Nov. 22, 1990
Announces resignation after party revolt.
Nov. 28, 1990
John Major succeeds her as prime minister.
June 26, 1992
Becomes Baroness Thatcher of Kesteven, a member of the unelected House of Lords with a lifetime title.
March 22, 2002
Ends public speaking after suffering a series of small strokes.
June 26, 2003
Her husband, Sir Denis Thatcher, dies.
April 8, 2013
Dies of stroke.
A portrait of former Prime Minister Margaret Thatcher is left next to floral tributes outside her residence in London.