When a U.S. service member is accused of an offense on a base overseas, the question of who may prosecute is rarely simple. More than one sovereign can have a legitimate claim. The United States can assert authority over its own forces under the Uniform Code of Military Justice. The host nation can assert authority because the conduct occurred on its territory. The framework that sorts out these competing claims is the Status of Forces Agreement, or SOFA, that the United States has negotiated with the host country. Understanding how a SOFA allocates jurisdiction is the starting point for any analysis of an offense committed on a foreign installation where the host nation is involved.
Two Sovereigns, One Event
The core tension is that an act on a U.S. base abroad can violate both U.S. military law and the criminal law of the host nation at the same time. The base may be operated by U.S. forces, but the land remains the sovereign territory of the host country. This creates concurrent jurisdiction, where both nations technically have the power to prosecute. SOFAs exist to manage that overlap by deciding which government gets the first, or primary, right to exercise jurisdiction in a given category of case, while leaving the other government with a secondary right.
The NATO SOFA Model of Concurrent Jurisdiction
The most widely studied example is the NATO SOFA, which governs U.S. forces in many allied countries and serves as a template for understanding the broader pattern. Under that agreement, the fundamental concept is concurrent or shared jurisdiction. The sending state, meaning the United States for U.S. personnel, holds the primary right to exercise jurisdiction over offenses that arise out of the performance of official duty and over offenses committed by one member of the force against another member of the same force or its property. The receiving state, the host nation, holds the primary right over most other offenses committed within its territory.
This division produces a practical rule of thumb. Offenses tied to the member’s official duties, and offenses where both the accused and the victim are part of the U.S. force, tend to fall to the United States. Offenses that spill into the host nation’s community, that involve local victims, or that are unrelated to official duty tend to fall to the host nation’s primary jurisdiction. The location of the act on the installation matters, …