A Machine Gun Company was attached to each Infantry Brigade and their subsequent Division, an additional Company was attached as a divisional reserve.
| Brigade attached to: | Divisional Reserve |
| Division attached to: | 4th Division |
The 234th M.G. Coy. joined the 4th Division on the 16 July 1917.
On 26 February 1918, it was amalgamated with the 10th, 11th and 12th Machine Gun Companies to form No. 4 Battalion, Machine Gun Corps.
As a unit of the 4th Infantry Division, it will have taken part in the following battles and engagements.
| 1917 | |
| BATTLES OF YPRES | |
| 28 September to 03 October | Battle of Polygon Wood [XIV. Corps, Fifth Army]. |
| 04 October | Battle of Broodseinde [XIV. Corps, Fifth Army]. |
| 09 October | Battle of Poelcappelle [XIV. Corps, Fifth Army]. |
| 12 October | First Battle of Passchendaele [XIV. Corps, Fifth Army]. |