Special Inspector General for Afghanistan Reconstruction
Costs were immense. Tens of thousands of people—including more than 2,450 U.S. servicemembers—were killed. Many more were injured, among them more than 20,700 U.S. servicemembers.
From 2002 through mid-2021, the United States Congress appropriated approximately $144.7 billion for Afghanistan reconstruction—far more than it spent on the post World-War-II Marshall Plan in inflation adjusted terms. The mission promised to bring stability and democracy to Afghanistan, yet ultimately delivered neither.
https://www.sigar.mil/Portals/147/Files/Reports/sigar-final-report.pdf