Lieutenant Commander

Lieutenant Commander was a senior field rank in many space navies throughout, including the  and Marines. The rank was senior to Lieutenant and subordinate to Commander, and almost never seen outside of formal military command structures. Holders of the rank were typically posted as the executive officers of smaller cruisers, frigates, and squadrons, or as commanders of small patrol vessels. On land, a lieutenant commander led company-sized units and smaller garrison bases, or else served as seconds to battalion commanders.