The rank of Lieutenant Coronel (O5) is the commissioned officer rank in the Imperial Marines that commands a Battalion or has duties of similar importance.
Each Battalion in the Imperial Marines will be commanded by a Lieutenant Coronel. Several staff posts at Brigade level (where these exist) or higher are also held by Officers with this rank.
History & Background (Dossier)
The word "colonel" derives from the same root as the word "column" (Italian: colonna) and means "of a column", and, by implication, "commander of a column". The word "colonel" is therefore linked to the word "column" in a similar way that "brigadier" is linked to "brigade", although in English this relationship is not immediately obvious. By the end of the late medieval period, a group of "companies" was referred to as a "column" of an army.
The prefix of "Lieutenant" implies that this rank is the deputy for the Colonel or Coronel.