General Two or more Field Armies operating together. Lieutenant General A Field Army. Major General A Corps or a Division. Brigadier General A Brigade. Colonel A Regiment. Lieutenant Colonel Second in Command of a Regiment. Major A Battalion of Infantry or Artillery or a Squadron of Cavalry. Captain A Company of Infantry, a Battery of Artillery or a Troop of Cavalry. First Lieutenant } Junior Officers of a Company, Second Lieutenant } Battery or Troop. NONCOMMISSIONED OFFICERS Sergeant Major, Regimental The senior or highest noncommissioned officer of a regiment. Sergeant Major, Battalion The senior noncommissioned or Squadron officer of a battalion of infantry or artillery or of a squadron of cavalry. First Sergeant The senior noncommissioned officer of a company, battery or troop. Color Sergeant The noncommissioned officer who carries the national flag, or colors, of a regiment. Sergeant The noncommissioned officer who acts as the right and left guide of a company, battery or troop, or of a subdivision of such a unit. Corporal The noncommissioned officer who acts as a squad leader. The duties of the corresponding grades of noncommissioned officers as given in the list on pages 30 and 31 are explained to a great extent by their titles. The Privates are the enlisted men of the rank and file who form the great body of the fighting force of the Army in all of its arms and branches. In the Navy the commands usually assigned to the Line officers of the various grades are as follows: COMMISSIONED OFFICERS