The United States Armed Forces completed their withdrawal from Afghanistan on 30 August 2021, marking the end of the 2001–2021 war. In February 2020, the Trump administration and the Taliban signed the United States–Taliban deal in Doha, Qatar,[7] which stipulated fighting restrictions for both the US and the Taliban, and provided for the withdrawal of all NATO forces from Afghanistan in return for the Taliban’s counter-terrorism commitments. The deal, and then the Biden administration’s final decision in April 2021 to pull out all US troops by September 2021 without leaving a residual force, were the two critical events that triggered the start of the collapse of the Afghan National Security Forces (ANSF).[8