Watson Institute for International and Public Affairs
Costs of War

Human Costs

Costs of War research examines the human toll of U.S. military operations and spending, for U.S. service members, veterans, military contractors, and allies; and for civilians killed and displaced.

An estimated over 940,000 people were killed by direct post-9/11 war violence in Iraq, Afghanistan, Syria, Yemen, and Pakistan between 2001-2023. Of these, more than 432,000 were civilians. The number of people wounded or ill as a result of the conflicts is far higher, as is the number of civilians who died “indirectly,” as a result of wars’ destruction of economies, healthcare systems, infrastructure and the environment. An estimated 3.6-3.8 million people died indirectly in post-9/11 war zones, bringing the total death toll to at least 4.5-4.7 million and counting.

READ MORE >

U.S. MILITARY, VETERANS, CONTRACTORS & ALLIES 

CIVILIANS KILLED & DISPLACED 

(Page updated as of June 2025)