A Marine Raider prepares to complete a raid during a RAVEN unit readiness exercise in Nashville, Tenn., Apr. 30, 2021. RAVEN is a training exercise held to evaluate all aspects of a Marine Special Operations Company prior to a Marine Forces Special Operations Command deployment. - A Marine Raider prepares to complete a raid during a RAVEN unit readiness exercise in Nashville, Tenn., Apr. 30, 2021. RAVEN is a training exercise held to evaluate all aspects of a Marine Special Operations Company prior to a Marine Forces Special Operations Command deployment.