Squadrons of the Machine Gun Corps (Cavalry) were known as Brigade Machine Gun Squadrons.
Terminology of machine gun units was officially set out in 1917.
Machine-Gun Corps.- The following definitions are laid down for the Cavalry, Infantry and Motor Branches of Machine Gun Corps:-
Section = 4 machine guns with personnel.
Sub-Section = 2 machine guns with personnel.
Detachment = 1 machine gun with personnel.
Training Manuals and War Establishments will be amended accordingly.Army Order 164 of 1917.
- The National Archives. WO 123/59. Army Orders 1917.