Soldiers struggle to pull a huge piece of artillery through mud. The gun has been placed on a track created for a light railway. The soldiers are pushing a device, attached to the gun, that possibly slots into the tracks. Some of the men are in a ditch that runs alongside the track, the rest are on the track itself. A makeshift caterpillar tread has been fitted to the wheels of the gun, in an attempt to aid its movement through the mud.