October 1, 1960 - Nigeria gains independence from Britain, with Abubakar Tafawa Balewa as the Prime Minister leading a coalition government of parliamentary system.
October 1, 1963 - Nigeria becomes a republic, breaking away from the British monarchy.
January 15, 1966 - Fall of the First Republic, as Prime Minister Tafawa Balewa is killed in unsuccessful coup led by some Majors.
January 16, 1966 - Johnson Aguiyi-Ironsi takes over as the nation’s Head of State.
July 29, 1966 - Aguiyi Ironsi killed in a counter-coup by a group of northern army officers who revolted against the government, and he is replaced by Yakubu Gowon.
January 5, 1967 - Military leaders and senior police officials of each region (East, North and South) sign an accord in Aburi, Ghana and agree on a loose confederation of regions.
May 30, 1967 - Chukwuemeka Odumegwu Ojukwu, the Eastern Region’s military governor, announces the break-away of the eastern states as the Republic of Biafra, sparking bloody civil war that led to the deaths over a million people.
January 12, 1970 - Biafran leaders surrender, as the officer administering the government, Phillip Effiong calls for a cease-fire. The region was reintegrated into Nigeria.
July 25, 1975 - Yakubu Gowon overthrown in a coup led by Murtala Ramat Mohammed, while attending the OAU summit in Uganda
February 13, 1976 - Murtala Mohammed assassinated in a failed coup attempt. His deputy, Olusegun Obasanjo, takes over
September 21, 1978 - A new constitution, styled on American presidential system, published, and the ban on political activity lifted.
1979 - Nation heads to the polls for a general election which saw the election of Shehu Shagari as the democratic president.
January 1983 - Government expels more than one million foreigners, mostly Ghanaians, saying they had overstayed their visas and taking jobs from Nigerians.
August, September 1983 - Shehu Shagari re-elected as the president, amid accusations of irregularities and corruption.
December 31, 1983 - Muhammad Buhari heads military officers who seize power in bloodless coup, to be become Commander in Command and Head of State.
August 27, 1985 - Ibrahim Babangida seizes power in bloodless coup, curtails political activity.
1986 - Babangida launches controversial Structural Adjustment Program (SAP) which shook up the nation’s economy
October 19, 1986 - Foremost journalist, Dele Giwa, assassinated by a parcel bomb which is often blamed on the Babaginda regime
April 22, 1990 - Gideon Orka leads coup to topple Babaginda, but the coup is unsuccessful.
December 12, 1991 - Nigeria’s capital city moved from Lagos to Abuja
June 12, 1993 - Babangida annuls the presidential elections adjudged to have been won by businessman, Moshood Abiola.
August 27 1993 - Babangida transfers power to Interim National Government led by Ernest Shonekan, following massive protest against his administration
November 17, 1993 - Sani Abacha seizes power from the Interim National Government and suppresses opposition.
1994 - Acclaimed winner of the June 12 election, MKO Abiola, arrested after proclaiming himself president.
November 10, 1995 - Ken Saro-Wiwa, writer and campaigner against the oil industry damage to his Ogoni homeland, executed following a hasty trial. In protest, the US and European Union impose sanctions on Nigeria
June 8, 1998 - Abacha passes away under controversial circumstances and succeeded by Abdulsalami Abubakar.
July 7, 1998 - Abiola dies in custody days after meeting a US delegation
1999 - Parliamentary and presidential elections lead to the election of Olusegun Obasanjo as the nation’s president.
2000 - Adoption of Sharia law by several northern states in the face of opposition from Christians
2001 - Tribal war in Benue State, displacing thousands of people, as soldiers sent to quash the fighting kill more than 200 unarmed civilians, apparently in retaliation for the abduction and murder of 19 soldiers.
November 2002 - Many lives lost in four days of protest stoked by fury from Northern Nigeria over the planned Miss World beauty pageant in Abuja
July 10, 2003 - Governor of Anambra State, Chris Ngige, abducted by a team of police officials and forced to sign his resignation letter, which was upheld by the State’s House of Assembly but over-turned by the Supreme Court.
September 27, 2003 - Nigeria’s first satellite, NigeriaSat-1 launched via Russian rocket into the space.
May 18, 2004 - State of emergency declared in Plateau State, after more than 200 people are killed in Yelwa in what would result in bosom-for-tat killings by Muslims and Christians in the state
January 2005 - Inspector General of Police, Tafa Balogun, forced to resign from office on corruption charges and subsequently tried and jailed by a court of law.
July 2005 - Paris Club of rich lenders agrees to write off two-thirds of Nigeria’s $30 billion debt.
January 9, 2006 - Militants in the Niger Delta commence major attack on pipelines and other oil facilities, and kidnap foreign oil workers for ransom, as they demand more control over the region’s oil wealth.
April 2006 - With record oil prices, Nigeria becomes first African nation to pay off its debt to the Paris Club of rich lenders.
May 17, 2006 - Senate rejects proposed changes to the constitution which would have allowed the President to stand for a third term in 2007.
August 6, 2006 - Nigeria cedes sovereignty over the disputed Bakassi peninsula to neighbouring Cameroon under the terms of a 2002 International Court of Justice ruling.
October29, 2006 - Sultan of Sokoto and tens of others die in a plane crash, the country’s third major civilian air disaster in the year.
August 14, 2008 - Nigeria finally hands over the Bakassi peninsula to Cameroon, ending a long-standing dispute.
May 2009 - Niger Delta militant group, MEND, rejects government offer of amnesty and declares offensive against Nigerian military.
August 2009 - Two-month offer of a government amnesty for Niger Delta militants comes into force, as thousands of militants drop their arms.
November 23, 2009 - President Yar’Adua travels to Saudi Arabia to be treated for a heart condition. His extended absence triggers a constitutional crisis and leads to calls for him to step down.
February 10, 2010 - National Assembly votes to transfer power to the Vice-President, Goodluck Jonathan, until Mr Yar’Adua is able to resume presidency. Mr Yar’Adua returns to Nigeria but does not return to work.
May 6, 2010 - Umaru Yar’Adua dies after a long illness. His vice-president, Goodluck Jonathan, already acting in Yar’Adua’s stead, succeeds him.