ISAF Afghanistan

The International Security Assistance Force (ISAF) was established by UN Security Council Resolution 1386 (20 December 2001) under Chapter VII of the UN Charter, following the Bonn Agreement that set up the Afghan Interim Authority. Its initial mandate was narrow: assist the new Afghan government in maintaining security in Kabul and surrounding areas. The mandate was later expanded by Resolution 1510 (2003) to cover the entire country.

ISAF was initially commanded on a rotating basis by individual troop-contributing nations (the UK led the first rotation, followed by Turkey, then a Germany–Netherlands partnership). In August 2003, NATO assumed command of ISAF — the Alliance's first operational deployment outside the Euro-Atlantic area. Expansion proceeded in four stages between 2003 and 2006, moving clockwise from the north, to the west, the south, and finally the east.

At its peak around 2010–2011, ISAF comprised roughly 130,000 troops from about 50 contributing nations, including all NATO members and partners such as Australia, Sweden, Finland, Georgia, and Jordan. It operated alongside, but separately from, the US-led Operation Enduring Freedom counter-terrorism mission, although the two were progressively integrated.

Core ISAF tasks included counter-insurgency against the Taliban and affiliated networks, training the Afghan National Security Forces (ANSF), and supporting Provincial Reconstruction Teams (PRTs). The mission generated significant debate over civilian casualties, night raids, and the sustainability of state-building.

ISAF formally concluded on 31 December 2014, transitioning to the smaller, non-combat NATO mission Resolute Support, which focused on training, advising, and assisting Afghan forces. Resolute Support itself ended in 2021 amid the US withdrawal and the Taliban's return to power in August of that year. ISAF remains a frequently studied case of collective security, alliance burden-sharing, and the limits of externally led stabilisation.