The Costs of War to United States Allies Since 9/11

Document Type


Publication Date



The United States’ allies in the post-9/11 wars have borne significant human and budgetary costs, and these costs should be included in a full accounting of the consequences of these wars. The 'post-9/11 wars' refers to U.S.-led military operations in Afghanistan and Iraq that have grown out of President George W. Bush's "Global War on Terror" and the U.S. invasion of Afghanistan in 2001. While Afghan and Iraqi government security forces have incurred the highest human costs of these wars, this research paper focuses on the human and financial contributions of European and other allies of the U.S.


This report is freely available on the website of Watson Institute at Brown University: https://watson.brown.edu/costsofwar/node/741. Dr. Davidson's report appears as part of the Costs of War Research Series.

Publisher Statement

The Costs of War Project is a team of over 50 scholars, legal experts, human rights practitioners, and physicians, which began its work in 2010. We use research and a public website to facilitate debate about the costs of the post-9/11 wars in Iraq and Afghanistan, and the related violence in Pakistan and Syria.