Large-scale evacuations of foreign citizens and some vulnerable Afghan citizens took place amid the withdrawal of US and NATO forces at the end of the 2001–2021 war in Afghanistan. The Taliban took control of Kabul and declared victory on 15 August 2021, and the NATO-backed Islamic Republic of Afghanistan collapsed. With the Taliban controlling the whole city except Hamid Karzai International Airport, hostilities ceased and the Taliban assisted in the evacuation effort by providing security and screening evacuees.

The War in Afghanistan was an armed conflict from 2001 to 2021. It was the direct response to the September 11 attacks. It began when an international military coalition led by the United States launched an invasion of Afghanistan, declaring Operation Enduring Freedom as part of the earlier-declared war on terror; toppling the Taliban-ruled Islamic Emirate and establishing the Islamic Republic three years later. The Taliban and its allies were expelled from major population centers by the US-led forces, supporting the anti-Taliban Northern Alliance; however Bin Laden relocated to neighboring Pakistan. The conflict officially ended with the 2021 Taliban offensive, which overthrew the Islamic Republic, and re-established the Islamic Emirate. It was the longest war in the military history of the United States, surpassing the length of the Vietnam War (1955–1975) by approximately six months.