4 May 2026

America’s Counterterrorism Wars

Peter Bergen, David Sterman, Melissa Salyk-Virk

​Editor’s note: This report was originally published on ​J​une 17, 2021, building on prior presentations of this data. The data and figures within are updated on an ongoing basis. The surrounding analysis and text have not been updated since the original publication. Readers should refer to the figures for the most current information.

This project tracks America’s counterterrorism wars​, including the drone war in Pakistan, air and ground operations in Yemen and Somalia, as well as the internationalized air war in Libya. It draws on news reports, official government statements, and available reporting from NGOs and other organizations. See the full methodology and also find detailed source information within each figure.

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