Afghanistan 2001: US-Led Invasion Overview

Timeline

7 October 2001
Afghanistan 2001 refers to the US-led invasion that toppled the Taliban regime following the September 11 attacks, launched under Operation Enduring Freedom…
11 September 2001
Afghanistan 2001 denotes the military intervention by the United States and its allies that began on 7 October 2001, codenamed Operation Enduring Freedom, wh…
14 September 2001
The legal architecture rested on the US Authorization for Use of Military Force (AUMF), passed by Congress on , and on the principle of self-defence under Ar…
12 September 2001
The UN Security Council had affirmed this right in Resolutions 1368 () and 1373 (28 September 2001), the latter establishing binding counter-terrorism obliga…
28 September 2001
The UN Security Council had affirmed this right in Resolutions 1368 (12 September 2001) and 1373 (), the latter establishing binding counter-terrorism obliga…
9 September 2001
The campaign combined US and British air power with ground operations by the Northern Alliance (United Islamic Front), the anti-Taliban coalition whose leade…
13 November 2001
Kabul fell on , and the Taliban stronghold of Kandahar surrendered in early December.
5 December 2001
The political settlement followed swiftly at the Bonn Conference (December 2001), which produced the Bonn Agreement of , installing Hamid Karzai as chairman…

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In December 2001, the UN-brokered Bonn Agreement installed Hamid Karzai as head of Afghanistan's interim administration after US-led forces and the Northern Alliance ousted the Taliban from Kabul.

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Timeline

7 October 2001

Afghanistan 2001 refers to the US-led invasion that toppled the Taliban regime following the September 11 attacks, launched under Operation Enduring Freedom…

11 September 2001

Afghanistan 2001 denotes the military intervention by the United States and its allies that began on 7 October 2001, codenamed Operation Enduring Freedom, wh…

14 September 2001

The legal architecture rested on the US Authorization for Use of Military Force (AUMF), passed by Congress on , and on the principle of self-defence under Ar…

12 September 2001

The UN Security Council had affirmed this right in Resolutions 1368 () and 1373 (28 September 2001), the latter establishing binding counter-terrorism obliga…

28 September 2001

The UN Security Council had affirmed this right in Resolutions 1368 (12 September 2001) and 1373 (), the latter establishing binding counter-terrorism obliga…

9 September 2001

The campaign combined US and British air power with ground operations by the Northern Alliance (United Islamic Front), the anti-Taliban coalition whose leade…

13 November 2001

Kabul fell on , and the Taliban stronghold of Kandahar surrendered in early December.

5 December 2001

The political settlement followed swiftly at the Bonn Conference (December 2001), which produced the Bonn Agreement of , installing Hamid Karzai as chairman…

Research it like a delegate

Afghanistan 2001 denotes the military intervention by the United States and its allies that began on 7 October 2001, codenamed Operation Enduring Freedom, which removed the Taliban government from power after it refused to surrender Osama bin Laden, mastermind of the 11 September 2001 attacks on the World Trade Center and the Pentagon. The legal architecture rested on the US Authorization for Use of Military Force (AUMF), passed by Congress on 14 September 2001, and on the principle of self-defence under Article 51 of the UN Charter. The UN Security Council had affirmed this right in Resolutions 1368 (12 September 2001) and 1373 (28 September 2001), the latter establishing binding counter-terrorism obligations and a Counter-Terrorism Committee. NATO invoked Article 5 of the Washington Treaty for the first time in its history on 12 September 2001, treating the attacks as an assault on all members.

The campaign combined US and British air power with ground operations by the Northern Alliance (United Islamic Front), the anti-Taliban coalition whose leader Ahmad Shah Massoud had been assassinated by al-Qaeda operatives on 9 September 2001, two days before the attacks. Kabul fell on 13 November 2001, and the Taliban stronghold of Kandahar surrendered in early December. Al-Qaeda and Taliban fighters retreated to the Tora Bora cave complex, where bin Laden eluded capture and crossed into Pakistan. The political settlement followed swiftly at the Bonn Conference (December 2001), which produced the Bonn Agreement of 5 December 2001, installing Hamid Karzai as chairman of an interim administration and creating the International Security Assistance Force (ISAF), authorised by UNSC Resolution 1386 (20 December 2001) and later led by NATO from 2003.

The intervention inaugurated the longest war in American history and the global "War on Terror." A new constitution was adopted in 2004 and Karzai was elected president, but the Taliban regrouped from sanctuaries in Pakistan, producing a prolonged insurgency. Bin Laden was eventually killed by US forces in Abbottabad, Pakistan, on 2 May 2011. The Doha Agreement between the US and the Taliban (29 February 2020) set a withdrawal timetable, and the US completed its exit on 30 August 2021, whereupon the Taliban recaptured Kabul on 15 August 2021 and re-established the Islamic Emirate of Afghanistan. As of 2026, no state has granted formal diplomatic recognition to the Taliban government, though several maintain working contacts.

For competitive examinations, Afghanistan 2001 is tested in World History and International Relations papers (UPSC GS Paper I and Paper II, FSOT, CSS Current Affairs and Pakistan Affairs). Typical question angles include the legal basis for the invasion (Article 51, Resolutions 1368/1373), NATO's first Article 5 invocation, the Bonn Agreement and ISAF's creation, Pakistan's frontline-state role under Pervez Musharraf, and the contrast between the 2001 intervention and the 2021 withdrawal. Candidates should distinguish the UN-authorised ISAF mandate from the US-led Operation Enduring Freedom, and connect the episode to the broader doctrine of pre-emption and the 2003 Iraq War.

Frequently asked questions

What was the legal basis for the 2001 invasion of Afghanistan?

The United States invoked the right of self-defence under Article 51 of the UN Charter, affirmed by Security Council Resolutions 1368 and 1373 (2001), and domestically by the AUMF of 14 September 2001. NATO invoked Article 5 of the Washington Treaty for the first time.

What was the Bonn Agreement of 2001?

Signed on 5 December 2001, the Bonn Agreement established an interim Afghan administration under Hamid Karzai and created the International Security Assistance Force (ISAF), authorised by UNSC Resolution 1386, to provide security in and around Kabul.

What was the significance of NATO's response to 9/11?

On 12 September 2001 NATO invoked Article 5 of the North Atlantic Treaty for the first time in its history, declaring the attacks on the United States an attack on all members and committing the alliance to collective defence.

How did the 2001 intervention conclude?

After the 2020 Doha Agreement set a withdrawal timetable, US forces fully exited by 30 August 2021. The Taliban recaptured Kabul on 15 August 2021 and restored the Islamic Emirate, which as of 2026 remains diplomatically unrecognised.

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Research Afghanistan 2001 like a delegate

Timeline

Research it like a delegate

Ask a follow-up about Afghanistan 2001

Frequently asked questions

What was the legal basis for the 2001 invasion of Afghanistan?

What was the Bonn Agreement of 2001?

What was the significance of NATO's response to 9/11?

How did the 2001 intervention conclude?

Go deeper than the definition

Take Afghanistan 2001 beyond the glossary

Frequently asked questions

What was the legal basis for the 2001 invasion of Afghanistan?

What was the Bonn Agreement of 2001?

What was the significance of NATO's response to 9/11?

How did the 2001 intervention conclude?