A Machine Gun Company was attached to each Infantry Brigade and their subsequent Division.
| Brigade attached to: | 18th Brigade |
| Division attached to: | 6th Division |
| Formed from the Machine Gun Sections of: | 1st Bn. The West Yorkshire Regiment 2nd Bn. The Durham Light Infantry 11th Bn. The Essex Regiment 14th Bn. The Durham Light Infantry |
The 18th Bde. M.G. Coy. was formed in January 1916 from the Machine Gun Sections of the listed infantry battalions.
As a unit of the 6th Division, it will have taken part in the following battles and engagements.
| 1916 | |
| BATTLES OF THE SOMME | |
| 15 to 18 September and 21 and 22 September | Battle of Flers-Courcelette [XIV. Corps, Fourth Army]. |
| 25 to 28 September | Battle of Morval [XIV. Corps, Fourth Army] |
| 25 September | Capture of Lesboeufs. |
| 09 to 18 October | Battle of the Transloy Ridge. [XIV. Corps, Fourth Army]. |
| 1917 | |
| 13 to 22 April | Fighting on Hill 70 (Lens) [I. Corps, First Army]. |
| 20 November to 03 December | BATTLE OF CAMBRAI. |
| 20 and 21 November | The Tank Attack [III. Corps, Third Army]. |
| 23 to 28 November | Capture of Bourlon Wood [III. Corps, Third Army]. |
| 30 November to 03 December | The German Counter-Attacks [III. Corps, Third Army]. |
On 01 March 1918, it was amalgamated with the 16th, 71st and 192nd Machine Gun Companies to form No. 6 Battalion, Machine Gun Corps.
