Twill Hat - Army - Lieutenant Colonel - LTC - Retired - V1100% Cotton twill 6 panel structure Adjustable Velcro closure DTF Print Lieutenant colonel is a rank of commissioned officers 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.