Operation Inherent Resolve (OIR)

What We Did:

We are pleased to present this Lead Inspector General (Lead IG) report to Congress on Operation Inherent Resolve (OIR). This report fulfills our quarterly reporting responsibilities pursuant to the Inspector General Act of 1978, as amended.

The United States launched OIR in 2014 to defeat the Islamic State in Iraq and Syria (ISIS), while setting the conditions for follow-on activities to increase regional stability. The U.S. Government strategy to defeat ISIS includes military operations and support for local security forces, diplomacy, governance, humanitarian assistance, and stabilization programs.

This report describes the activities of the U.S. Government in support of OIR as well as the work of the Department of War (DoW), the Department of State (State), and the U.S. Agency for International Development (USAID) to further the U.S. Government's policy goals in Iraq and Syria. This report also discusses the planned, ongoing, and completed oversight work conducted by the Lead IG agencies-the DoW, State, and USAID OIGs-and our partner oversight agencies. This report covers the period January 1 through March 31, 2026.