A chronology of key events:
1838-42 - British forces invade, install King Shah Shujah. He is assassinated in 1842. British and Indian troops are massacred during retreat from Kabul.
1878-80 - Second Anglo-Afghan War. A treaty gives Britain control of Afghan foreign affairs.
1919 - Emir Amanullah Khan declares independence from British influence.
1926-29 - Amanullah tries to introduce social reforms, which however stir civil unrest. He flees.
1933 - Zahir Shah becomes king and Afghanistan remains a monarchy for next four decades.
1953 - General Mohammed Daud becomes prime minister. Turns to Soviet Union for economic and military assistance. Introduces social reforms, such as abolition of purdah (practice of secluding women from public view).
1963 - Mohammed Daud forced to resign as prime minister.
1964 - Constitutional monarchy introduced - but leads to political polarisation and power struggles.
1973 - Mohammed Daud seizes power in a coup and declares a republic. Tries to play off USSR against Western powers.
1978 - General Daud is overthrown and killed in a pro-Soviet coup. The People's Democratic Party comes to power but is paralysed by violent infighting and faces opposition by US-backed mujahideen groups.Soviet intervention
1979 December - Soviet Army invades and props up communist government.
1980 - Babrak Karmal installed as ruler, backed by Soviet troops. But opposition intensifies with various mujahideen groups fighting Soviet forces. US, Pakistan, China, Iran and Saudi Arabia supply money and arms to the mujahideen.
1985 - Mujahideen come together in Pakistan to form alliance against Soviet forces. Half of Afghan population now estimated to be displaced by war, with many fleeing to neighbouring Iran or Pakistan.
1986 - US begins supplying mujahideen with Stinger missiles, enabling them to shoot down Soviet helicopter gunships. Babrak Karmal replaced by Najibullah as head of Soviet-backed regime.
1988 - Afghanistan, USSR, the US and Pakistan sign peace accords and Soviet Union begins pulling out troops.Red Army quits
1989 - Last Soviet troops leave, but civil war continues as mujahideen push to overthrow Najibullah.
1992 - Najibullah's government toppled, but a devastating civil war follows.
1996 - Taliban seize control of Kabul and introduce hard-line version of Islam, banning women from work, and introducing Islamic punishments, which include stoning to death and amputations.
1997 - Taliban recognised as legitimate rulers by Pakistan and Saudi Arabia. They now control about two-thirds of country.
1998 - US launches missile strikes at suspected bases of militant Osama bin Laden, accused of bombing US embassies in Africa.
1999 - UN imposes an air embargo and financial sanctions to force Afghanistan to hand over Osama bin Laden for trial.
2001 September - Ahmad Shah Masood, leader of the main opposition to the Taliban - the Northern Alliance - is assassinated.US-led invasion
2001 October - US-led bombing of Afghanistan begins following the September 11 attacks on the United States. Anti-Taliban Northern Alliance forces enter Kabul shortly afterwards.
2001 December - Afghan groups agree deal in Bonn, Germany for interim government.
Hamid Karzai is sworn in as head of an interim power-sharing government.
2002 January - Deployment of first contingent of foreign peacekeepers - the Nato-led International Security Assistance Force (ISAF) - marking the start of a protracted fight against the Taliban.
2002 April - Former king Zahir Shah returns, but makes no claim to the throne and dies in 2007.
2002 June - Loya Jirga, or grand council, elects Hamid Karzai as interim head of state. Karzai picks members of his administration which is to serve until 2004.
2003 August - Nato takes control of security in Kabul, its first-ever operational commitment outside Europe.Elections
2004 January - Loya Jirga adopts new constitution which provides for strong presidency.
2004 October-November - Presidential elections. Hamid Karzai is declared winner.
2005 September - Afghans vote in first parliamentary elections in more than 30 years.
2005 December - Parliament opens with warlords and strongmen in most of the seats.
2006 October - Nato assumes responsibility for security across the whole of Afghanistan, taking command in the east from a US-led coalition force.
2007 August - Opium production has soared to a record high, the UN reports.
2008 June - President Karzai warns that Afghanistan will send troops into Pakistan to fight militants if Islamabad fails to take action against them.
2008 July - Suicide bomb attack on Indian embassy in Kabul kills more than 50.
2008 September - US President George Bush sends an extra 4,500 US troops to Afghanistan, in a move he described as a "quiet surge".
2009 January - US Defence Secretary Robert Gates tells Congress that Afghanistan is new US administration's "greatest test".
2009 February - Nato countries pledge to increase military and other commitments in Afghanistan after US announces dispatch of 17,000 extra troops.New US approach
2009 March - US President Barack Obama unveils new strategy for Afghanistan and Pakistan. An extra 4,000 US personnel will train and bolster the Afghan army and police and there will be support for civilian development.
2009 August - Presidential and provincial elections are marred by widespread Taliban attacks, patchy turnout and claims of serious fraud.
2009 October - Mr Karzai declared winner of August presidential election, after second-placed opponent Abdullah Abdullah pulls out before the second round.
2009 December - US President Obama decides to boost US troop numbers in Afghanistan by 30,000, bringing total to 100,000. He says US will begin withdrawing its forces by 2011.
An Al-Qaeda double agent kills seven CIA agents in a suicide attack on a US base in Khost.
2010 February - Nato-led forces launch major offensive, Operation Moshtarak, in bid to secure government control of southern Helmand province.
2010 July - Whistleblowing website Wikileaks publishes thousands of classified US military documents relating to Afghanistan.
General David Petraeus takes command of US, ISAF forces.
2010 August - Dutch troops quit.
Karzai says private security firms - accused of operating with impunity - must cease operations. He subsequently waters down the decree.
2010 September - Parliamentary polls marred by Taliban violence, widespread fraud and a long delay in announcing results.
2010 November - Nato - at summit in Lisbon - agrees plan to hand control of security to Afghan forces by end of 2014.
2011 January - President Karzai makes first official state visit to Russia by an Afghan leader since the end of the Soviet invasion in 1989.
2011 February - Number of civilians killed since the 2001 invasion hit record levels in 2010, Afghanistan Rights Monitor reports.
2011 April - Burning of Koran by a US pastor prompts country-wide protests in which foreign UN workers and several Afghans are killed.
Some 500 mostly Taliban prisoners break out of prison in Kandahar.
2011 July - President's half-brother and Kandahar governor Ahmad Wali Karzai is killed in Taliban campaign against prominent figures.
2011 September - Ex-president Burhanuddin Rabbani - a go-between in talks with the Taliban - is assassinated.
2011 October - As relations with Pakistan worsen after a series of attacks, Afghanistan and India sign a strategic partnership to expand co-operation in security and development.Military pact
2011 November - President Karzai wins the endorsement of tribal elders to negotiate a 10-year military partnership with the US at a loya jirga traditional assembly. The proposed pact will see US troops remain after 2014, when foreign troops are due to leave the country.
2011 December - At least 58 people are killed in twin attacks at a Shia shrine in Kabul and a Shia mosque in Mazar-i-Sharif.
Pakistan and the Taleban boycott the scheduled Bonn Conference on Afghanistan. Pakistan refuses to attend after a Nato air strike killed Pakistani soldiers on the Afghan border.
2012 January - Taliban agree to open office in Dubai as a move towards peace talks with the US and the Afghan government.
2012 February - At least 30 people are killed in protests about the burning of copies of the Koran at the US Bagram airbase. US officials believed Taliban prisoners were using the books to pass messages, and that they were extremist texts not Korans. Two soldiers are also killed in reprisal attacks.
2012 March - US Army Sgt Robert Bales is accused of killing 16 civilians in an armed rampage in the Panjwai district of Kandahar.
2012 April - Taliban announce "spring offensive" with audacious attack on the diplomatic quarter of Kabul. The government blamed the Haqqani Network. Security forces kill 38 militants.Nato withdrawal plan
2012 May - Nato summit endorses the plan to withdraw foreign combat troops by the end of 2014.
New French President Francois Hollande says France will withdraw its combat mission by the end of 2012 - a year earlier than planned.
Arsala Rahmani of the High Peace Council is shot dead in Kabul. A former Taliban minister, he was crucial in reaching out to rebel commanders. The Taliban deny responsibility.
2012 July - Tokyo donor conference pledges $16bn in civilian aid to Afghanistan up to 2016, with US, Japan, Germany and UK supplying bulk of funds. Afghanistan agrees to new conditions to counter corruption.
2012 August - The US military discipline six soldiers for accidentally burning copies of the Koran and other religious texts in Afghanistan. They will not face criminal prosecution. Three US Marines are also disciplined for a video in which the bodies of dead Taliban fighters were urinated on.
2012 September - US hands over Bagram high-security jail to the Afghan government, although it retains control over some foreign prisoners until March 2013.
The US also suspends training new police recruits in order to carry out checks on possible ties to Taliban following series of attacks on foreign troops by apparent police and Afghan soldiers.
2013 February - President Karzai and Pakistan's Asif Ali Zardari agree to work for an Afghan peace deal within six months after talks hosted by Britain's Prime Minister David Cameron. They back the opening of an Afghan office in Doha and urge the Taliban to do the same for talks to take place.
2013 March - Two former Kabul Bank chiefs, Sherkhan Farnood and Khalilullah Ferozi, are jailed for the multi-million dollar fraud that almost led to its collapse and that of the entire Afghan banking system in 2010.
2013 June - Afghan army takes command of all military and security operations from Nato forces.
President Karzai suspends security talks with the US after Washington announces it plans to hold direct talks with the Taliban. Afghanistan insists on conducting the talks with the Taliban in Qatar itself.
2013 November - Consultative loya jirga assembly of elders backs President Karzai's proposed security agreement to provide US military with bases after Nato troops formally withdraw in 2014. President Karzai delays signing the deal.
2014 January - Taliban suicide squad hits a restaurant in Kabul's diplomatic quarter, the worst attack on foreign civilians since 2001. The 13 foreign victims include IMF country head.
2014 February - Start of presidential election campaign, which is marked by a rise in attacks by the Taliban.
2014 April - Presidential election.