US Budgetary Costs and Obligations of Post-9/11 Wars Through FY2020: $6.4 Trillion
By Prof. Neta C. Crawford
Since late 2001, the United States has appropriated and is obligated to spend an estimated $6.4 Trillion through Fiscal Year 2020 in budgetary costs related to and caused by the post-9/11 wars—an estimated $5.4 Trillion in appropriations in current dollars and an additional minimum of $1 Trillion for US obligations to care for the veterans of these wars through the next several decades.[2]
The mission of the post-9/11 wars, as originally defined, was to defend the United States against future terrorist threats from al Qaeda and affiliated organizations. Since 2001, the wars have expanded from the fighting in Afghanistan, to wars and smaller operations elsewhere, in more than 80 countries — becoming a truly “global war on terror.” Further, the Department of Homeland Security was created in part to coordinate the defense of the homeland against terrorist attacks.
These wars, and the domestic counterterror mobilization, have entailed significant expenses, paid for