The Special Operations Training Group, or SOTG, is a training section of the United States Marine Corps providing Marine Expeditionary Force (MEF) commanders with training facilities and a liaison for Marine Expeditionary Units (MEU). The SOTG provides special operations training for various branches and also participates in the MEUs' Special Operations Capable Certification by acting as the "Training and Evaluation Board" for the exercises and events during the MEU annual training cycles.

The mission of the Special Operations Training Group (SOTG), known in most commands as the Expeditionary Operations Training Group (EOTG), is to train, evaluate, and certify Marine Expeditionary Units (MEUs) and other designated forces in preparation for deployment.

The Expeditionary Operations Training Group leads and evaluates major pre-deployment exercises for Marine Expeditionary Units, such as Realistic Urban Training (RUT) and other work-up events that test a unit’s readiness for combat and contingency operations. During these work-ups, EOTG instructors integrate land-based and maritime training, ranging from direct-action raids and urban warfare to visit-board-search-and-seizure (VBSS) missions, to ensure that all elements of the MEU can operate together effectively before deployment.

In addition to certifying MEUs as Special Operations Capable (SOC) forces, EOTG provides advanced instruction in amphibious warfare, urban operations, reconnaissance, fire support coordination, and small-unit tactics. The group also acts as a liaison between deploying MEUs and higher headquarters, ensuring that training events align with operational requirements and current threat environments.