Operational Group Command (OG), was a branch of the Office of Strategic Services (OSS) during World War II that specialized in clandestine and covert operations, combat search and rescue POWs and allies spies captured in areas occupied by the Axis powers, commando style raids on key targets, frontline military intelligence gathering, guerrilla warfare, independent operations against designated Axis powers targets, maneuver warfare, providing military assistance to resistance movement groups in areas occupied by the Axis powers, special reconnaissance, and support military strategy and tactical operational plans.