Lieutenant colonel (UK: /lɛfˈtɛnəntˈkɜːrnəl/ or US: /luːˈtɛnəntˈkɜːrnəl/) is a rank of commissioned officer in the armies, most marine forces and some air forces of the world, above a major and below a colonel. Several police forces in the United States use the rank of lieutenant colonel. The rank of lieutenant colonel is often shortened to simply "colonel" in conversation and in unofficial correspondence. Sometimes, the term 'half-colonel' is used in casual conversation in the British Army. In the United States Air Force, the term 'light bird' or 'light bird colonel' (as opposed to a 'full bird colonel') is an acceptable casual reference to the rank but is never used directly towards the rank holder. A lieutenant colonel is typically in charge of a battalion or regiment in the army.
Lieutenant colonel ranks by country
The following articles deal with the rank of lieutenant colonel (or its equivalent)
^All Indonesian military services share the same rank name and insignia – i.e. two gold jasmine buds. A lieutenant colonel in the Army usually has a billet as battalion commander, regiment / brigade chief of staff, headquarters staff, department head, or commander of any unit that has the same level as battalion. In the Navy, the common billet is ship's commanding officer, squadron commander, shore department head or staff position. In the Air Force, it has the billet of squadron commander of battalion commander of Air Force Special Force's Corps. In the Marine Corps, usual billet is infantry battalion commander or infantry brigade's chief of staff, although it can command an artillery or cavalry regiment.
^ LTC Keith E. Bonn, Army Officer's Guide, 50th Edition, p. 14. Mechanicsville, Pa.: Stackpole Books, 2005.