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
Major Major Major is a military rank of commissioned officer status, with corresponding ranks existing in many military forces throughout the world. When used unhyphenated, in conjunction with no other indicators, major is one rank senior to that of an army captain, and one rank subordinate or below the rank of lieutenant colonel. It is considered the most junior of the field officer ranks. Majors are typically assigned as specialised executive or operations officers for battalion-sized units of 300 to 1,200 soldiers. In some militaries, notably France and Ireland, the rank of major is referred to as "commandant", while in others