Warfare, Irregular Threats, and Terrorism Program
The Warfare, Irregular Threats, and Terrorism Program (WITT) focuses on the activities and capabilities of countries like China, Russia, and Iran as well as the threat and evolution of paramilitary groups and terrorist networks
Led by Dr. Daniel Byman, the Warfare, Irregular Threats, and Terrorism Program (formerly known as the Transnational Threats Project) conducts research and analysis on irregular and hybrid warfare, terrorism, and military operations. The program examines Chinese, Russian, and Iranian irregular and hybrid warfare activities, such as covert action, economic warfare, support to non-state partners, cyber operations, disinformation, political warfare, and espionage. It also assesses terrorist and paramilitary activities by such organizations as Lebanese Hezbollah, Shia militias, the Houthi movement (or Ansar Allah), the Islamic State, al Qaeda, and far-right and far-left extremist networks. Finally, the program researches the military capabilities of China, Russia, and other U.S. adversaries and examines how the United States and its allies can best respond.
The Warfare, Irregular Threats, and Terrorism Program conducts fieldwork overseas, builds and analyzes data sets, and utilizes satellite imagery and other types of qualitative and quantitative analysis. It also draws from an extensive network of policy experts from the U.S. and partner governments, Congress, academia, nongovernmental organizations (NGOs), and the private sector. In partnership with CSIS’s Andreas C. Dracopoulos iDeas Lab, the program translates its research into high-quality videos, podcasts, reports, visualizations, and other products designed to engage audiences and inform policy discussions through objective analysis. The Warfare, Irregular Threats, and Terrorism Program's work is highly valued by government officials, corporate executives, and other influential leaders seeking to understand, prevent, and counter transnational threats.
Contact Information
- Riley McCabe
- Associate Fellow, Warfare, Irregular Threats, and Terrorism Program
- rmccabe@csis.org
Media Queries
- H. Andrew Schwartz
- Chief Communications Officer
- 202.775.3242
- aschwartz@csis.org
- Samuel Cestari
- Media Relations Coordinator, External Relations
- 202.775.7317
- scestari@csis.org
Latest Analysis

Photo: iLab/CSIS
Global Terrorism Threat Assessment 2025
Report by Alexander Palmer, Riley McCabe, Daniel Byman, and Skyeler Jackson — March 28, 2025

Fighting with Allies: Transforming Multinational Strategic Planning in the U.S. Department of Defense
Report by Sean Monaghan, Alexander Palmer, and Chris H. Park — March 26, 2025

Foreign Malign Influence Targeting U.S. and Allied Corporations
Brief by Daniel Byman — March 20, 2025

The Escalating Attacks on Tesla Facilities
Critical Questions by Riley McCabe — March 20, 2025
Russia’s Shadow War Against the West
Brief by Seth G. Jones — March 18, 2025
All Warfare, Irregular Threats, and Terrorism Program Content
Filter by
“Global Terrorism Threat Assessment 2024”: Audio Brief with Catrina Doxsee
Podcast Episode by Catrina Doxsee — February 8, 2024

U.S. Strikes Back
Podcast Episode by H. Andrew Schwartz and Seth G. Jones — February 6, 2024

Daniel Byman in Foreign Policy: Biden Walks a Fine Line With Airstrikes on Iran-Backed Militants
Commentary by Daniel Byman — February 2, 2024
“God, Guns, and Sedition: Far-Right Terrorism in America” with Bruce Hoffman and Jacob Ware
Event — January 31, 2024
Can a Regional War Be Avoided in the Middle East?
Commentary by Daniel Byman and Seth G. Jones — January 17, 2024
Wider War in Mideast
Podcast Episode by H. Andrew Schwartz and Norman T. Roule — January 9, 2024

“Hamas’s October 7 Attack: Visualizing the Data”: Audio Brief with Riley McCabe
Podcast Episode by Riley McCabe — December 20, 2023

“Why Hamas Attacked When It Did”: Audio Brief with Dan Byman
Podcast Episode by Daniel Byman — December 20, 2023

Hamas’s October 7 Attack: Visualizing the Data
Commentary by Daniel Byman, Riley McCabe, Alexander Palmer, Catrina Doxsee, Mackenzie Holtz, and Delaney Duff — December 19, 2023
Why Hamas Attacked When It Did
Commentary by Daniel Byman and Mackenzie Holtz — December 6, 2023