Colonel

Colonel /ˈkɜrnəl/, abbreviated Col, is a military rank of a senior commissioned officer. It or a corresponding rank exists in most armies and in many air forces; the naval equivalent rank is generally captain. In air forces with a separate rank structure, the equivalent rank is generally group captain. It is also used in some police forces and other paramilitary rank structures. A colonel was typically in charge of a regiment in an army, especially in Great Britain; but typically commander of a brigade in the U.S. Army as of 2012.

'Colonel' is usually the highest or second-highest field rank, and is below the general ranks.

Read more about Colonel:  History and Origins