This coming summer will mark the twentieth anniversary of the initiation of NATO's engagement in Afghanistan in August 2003, which ended in August 2021 as a result of the collapse of the Government of the Islamic Republic of Afghanistan (GIRoA) and the return to power of the Taliban. This endeavour, extraordinary in both ambition and scope, brought together the commitments and contributions of troops and other resources by nearly 50 NATO and non-NATO nations from around the world, with the goal of building a stable Afghanistan freed from use as a safe haven for terrorism.