1998, Curt Johnson, Richard Claire Anderson, chapter 1, in Artillery Hell: The Employment of Artillery at Antietam[1], →ISBN, page 28:
The guidon-bearer was placed by the battery commander to mark the right of the gun line, with the gun platoon aligned to his left.
2013 March, “The Firepower Behind the Army”, in Army Life: Your guide to the Royal Artillery[2], UK MoD, page 9:
As soon as Lee reaches the Command Post, Matthew directs him forward to the gun line where the crews are preparing the Light Guns.
1917 July 1, Army War College, “Third British Army, Artillery Instructions, No. 3 Notes on the Organization of a Battery for Active Operations”, in Field Artillery Notes[3], number 4, page 53:
The executive at the gun line is responsible for the drill and fire discipline of the battery.
1916 June 10, “The Mountain Gun and Mule Team”, in Scientific American: Supplement[4], volume 81, number 2110, page 372:
A mountain battery is divided into a "Gun Line" and an "Ammunition Line." Six guns and twelve ammunition-mules form the "Gun Line."
Boyer, Richard (2007) Dictionary of Military terms[5], 3 edition, London: A&C Black, →ISBN, archived from the original on 9 April 2012, page 113: “the fire position of a battery”
“Gun Line”, in TERMIUM Plus, Government of Canada Translation Bureau, 199803, retrieved 2013
