From the post:
The Ordnance Quick Firing 18 pounder (84mm) gun is our standard field piece and the backbone of the Royal Artillery. It fires a heavier shell than the French 75mm or German 77mm, and is accurate, reliable, and has good range. Combined with the well-trained crews of the Royal Artillery, the 18 pounder can out-shoot any foe.
Mobile for its size, the 18 pdr was often used by forward detachments. The Royal Artillery are learning to operate in small units attached to the front line infantry to help deal with German tanks or offer direct fire to knock out enemy gun emplacements.