13 October 1925
Margaret Hilda Roberts born in Grantham, Lincolnshire.
Attends the University of Oxford to read chemistry and law. Becomes president of the Oxford University Conservative Association, her first political job.
Fights and loses her first parliamentary election to be MP for Dartmouth.
Marries Denis Thatcher.
Elected Conservative MP for Finchley.
Harold Macmillan appoints her junior minister of pensions and national insurance.
After the Conservative victory in the 1970 general election, Edward Heath appoints her secretary of state for education and science, but she loses the position in the 1974 general election defeat.
Wins leadership challenge against Edward Heath.
4 May 1979
Thatcher is elected Britain's first female prime minister. She retains the position for 11 and a half years, making her the longest serving prime minister of the 20th century.
2 April 1982
Argentina invades the Falkland Islands. Within days Thatcher sends a huge military task force to the southern Atlantic.
14 June 1982
British forces recapture Port Stanley. Argentina surrenders in what is seen as a resounding victory for Margaret Thatcher, confirming her "Iron Lady" nickname.
9 June 1983
Margaret Thatcher wins her second general election with a majority of 144 seats in the wake of the Falklands war that greatly increased her popularity. Unemployment was at 3 million.
6 March 1984
A national miners' strike begins under NUM leader Arthur Scargill, in response to the closure of uncompetitive mines. Riots and the miners' strikes dominate the news as Britain edges towards chaos. The strike collapses after a year, prompting the government to press ahead with its legislation restricting trade union rights.
12 October 1984
Thatcher is the target of an IRA bomb that explodes during the Conservative party conference at the Grand Hotel in Brighton. She escapes uninjured. Five people were killed, including Conservative MP Sir Anthony Berry.
11 June 1987
Thatcher wins a third general election with a majority of 101 seats.
1 April 1990
The hugely unpopular community charge, or "poll tax", is introduced. Protests against the tax turn into riots.
A tearful Thatcher leaves Downing Street after losing the support of the party over differences on European Economic Community policy and the poll tax debacle.
30 June 1992
Takes her seat in the House of Lords as Baroness Thatcher of Kesteven.
22 March 2002
Doctors advise Thatcher to give up making public speeches for health reasons after suffering a series of strokes.
1 July 2002
Thatcher publishes a book on international relations, which includes the controversial idea that the UK should leave the EU and join Nafta.
26 June 2003
Thatcher's husband Denis dies at the age of 88. They had been married for 52 years.
13 October 2005
Thatcher marks her 80th birthday at party in a Hyde Park hotel with the Queen and Prince Philip among the guests.
13 September 2007
Gordon Brown invites Thatcher back to 10 Downing St for a visit.
30 January 2008
David Cameron presents Thatcher with a lifetime achievement award at a Great Britons award ceremony.
7 March 2008
Thatcher is admitted to hospital after being taken ill at a House of Lords dinner. Released the following day.
12 June 2009
The former prime minister suffered a broken arm in a fall. She underwent surgery and left hospital at the end of the month.
23 November 2009
Thatcher returned to Downing Street again for the unveiling of an official portrait at No 10.
8 June 2010
David Cameron, the first Conservative prime minister for 13 years, invites his predecessor to Downing Street for a private meeting.
14 October 2010
A party is held for the former prime minister's 85th birthday in Downing Street, but Thatcher is unable to attend after being taken ill with flu. She was taken to hospital and discharged two weeks later.
1 November 2010
Thatcher comes top in a YouGov/AOL poll naming the world's most influential women.
29 April 2011
Although invited, Thatcher is unable to attend the wedding of Prince William and Kate Middleton for health reasons.
6 January 2012
The film The Iron Lady is released, starring Meryl Streep as Thatcher and prompting a wave of media coverage analysing her time in office.
8 April 2013
Thatcher's death is announced at the age of 87.
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