Colonel (United States) Colonel (United States) In the United States Army, Marine Corps, and Air Force, colonel () is the most senior field grade military officer rank, immediately above the rank of lieutenant colonel and immediately below the rank of brigadier general. It is equivalent to the naval rank of captain in the other uniformed services. The pay grade for colonel is O-6. The insignia of the rank of colonel, as seen on the right, is worn on the officer's left side (a mirror-image version is worn on the right side, such that the eagle always faces forward to the wearer's front; the
British Army officer rank insignia Colonel on the Staff. Since 1928, a Brigadier has had the same rank badges as were displayed by a Colonel Commandant. Initially company and field rank insignia did not appear on officers' uniforms. In 1791 the War Office ordered officers to wear different graded epaulettes and wings to distinguish regimental officer ranks (Colonel to Ensign/ Cornet). This was ordered only for line Infantry officers. According to the Army Order, In 1795, a special pattern of epaulettes was ordered for Fusiliers and Light Infantry officers. Field officers of those regiments wore epaulettes over wings. Company officers wore wings. In February 1810,