War in Afghanistan (2001–2021)

Armed conflict in Afghanistan, 2001-2021, the longest war in US military history. A US-led coalition invaded after the September 11 attacks by Taliban-allied al-Qaeda and toppled the Taliban; the Taliban regrouped and, after the 2020 US-Taliban deal and US withdrawal, retook Kabul on 15 August 2021, last aircraft departing 30 August. An estimated 176,000-212,000 died, including 46,319 civilians.