A Machine Gun Company was attached to each Infantry Brigade and their subsequent Division.
| Brigade attached to: | 20th Brigade |
| Division attached to: | 7th Division |
| Formed from the Machine Gun Sections of: | 2nd Bn. The Border Regiment 2nd Bn. The Gordon Highlanders 8th Bn. The Devonshire Regiment 9th Bn. The Devonshire Regiment |
The 20th Bde. M.G. Coy. was formed on 10 February 1916 from the Machine Gun Sections of the listed infantry battalions.
As a unit of the 7th Division, it will have taken part in the following battles and engagements.
| 1916 | |
| BATTLES OF THE SOMME | |
| 01 to 05 July | Battle of Albert [XV. Corps, Fourth Army]. |
| 01 July | Capture of Mametz. |
| 14 to 17 July | Battle of Bazentin Ridge [XV. Corps, Fourth Army]. |
| 20 July | Attack on High Wood[XV. Corps]. |
| 03 to 07 September | Battle of Guillemont [XV. Corps, Fourth Army]. |
| 1917 | |
| 11 to 15 January and 21 February to 05 March | Operations on the Ancre [V. Corps, Fifth Army]. |
| 14 March to 05 April | German Retreat to the Hindenburg Line [V. Corps, Fifth Army]. |
| 03 to 16 May | Battle of Bullecourt [V. Corps, Fifth Army]. |
| BATTLES OF YPRES | |
| 01 to 03 October | Battle of Polygon Wood [X. Corps, Second Army]. |
| 04 October | Battle of Broodseinde [X. Corps, Second Army]. |
| 09 October | Battle of Poelcappelle [X. Corps, Second Army]. |
On the 10th November the decision was warned that it would be moved to Italy. Entrainment began on the 17th November, and by the 28th detrainment was virtually completed in the neighbourhood of Legnano (on the Adige). The 7th Division then advanced to the Piave Front and became reserve to the XIV. Corps.
1918
On the 19th January the 7th Division took over the right sector of the XIV. Corps front on the Piave, and remained in the line until, on the 23rd February, orders were received that the division was to return to France. On the 4th March the move to France was cancelled, and between the 22nd and 31st March the division took over the left divisional front of the XIV. Corps on the Asiago Plateau.
On 01 April 1918, it was amalgamated with the 22nd, 91st and 220th Machine Gun Companies to form No. 7 Battalion, Machine Gun Corps.
