Military rank Typical army and marine field officer ranks include colonel , lieutenant colonel, major and, in the British army, captains holding an adjutant's appointment. In many Commonwealth countries the field rank of brigadier is used, although it fills the position held by brigadier general in other countries. Naval and coast guard senior officer ranks include captain and commander. In some countries, the more senior rank of commodore is also included. In others lieutenant-commanders, as equivalents to army and marine majors, are considered senior officers. Commonwealth air force senior officer ranks include group captain, wing commander, and squadron leader, where such ranks
Commandant (rank) (Comdt) () is a military rank in both the Irish Army and Irish Air Corps. It is equivalent to major and squadron leader. In the Irish Naval Service, the equivalent rank is lieutenant commander. Commandant (shortened from "capitaine-commandant", i.e. a "captain commanding" (a battalion)), is an officer-grade rank of the Military of France, specifically the French Army and the French Air Force, which is equivalent to major. The "commandant" is also styled "chef de bataillon" ("battalion head") in the infantry, "chef d'escadrons" ("squadrons head") in the armoured cavalry and "chef d'escadron" ("squadron head") in the artillery and the "Gendarmerie". "Commandant"