1 P.H. or Smoke Helmet. This is a spare gas helmet, which is out of use, but is perfectly effective, and may be used if the small box respirator is damaged. 1 Haversack. This is fastened on the back of the man. D-shaped buckles are provided on the Webb equipment to allow for this. 1 Rubber Sheet. Fastened on the outside of the haversack. 220 Rounds of Small Arm Ammunition. 2 Mills Bombs per man. Ten bombs to bombers and rifle grenadiers. The latter have grenade cups, and copper rods about 12 inches long which are screwed into the base of the Mills bomb and are fired from a rifle. 1 Ground Flare and Matches. 1 First Field Dressing. 2 Identification Discs. 1 Mess Tin. 2 Water Bottles, filled with water. 1 Jerkin. 1 Entrenching Tool and Handle. 1 Wire Cutter. Usually the riflemen have wire cutters attached to their rifle. There are about seven men supplied with wire cutters in a platoon. 1 Rifle and Bayonet. Besides the above, during the cold and rainy weather each man takes a turn to carry the jar of rum, extra rations and bombs. Tommy is pretty well loaded down by the time he has all his equipment on him. Sometimes he may have to carry two extra bandoliers of cartridges. There are four battalions to an infantry brigade and, like the company system, one of these four battalions in its turn is out for rest and training behind the lines. During this time the other battalions are taking their turn in the trenches. The battalions may be in the trenches for ten days. No fixed time is allotted as we have found out by experience that the Germans somehow or other learn the night and time of our relief and they then open up their artillery upon us. Consequently when we go into the trenches, we never know how long we are going to remain there. We might make a tour of say ten days, three days in the support line, two days in the front, two days in the reserve, then back again for another three days in the front line. It all depends upon brigade headquarters staff, who order operations for relief before the battalion takes over the trenches from another unit. The relief takes place under cover of darkness. The battalion that is relieving the one that is in the trenches is met by guides from the battalion to be relieved at a rendezvous point. There is one guide for each platoon. He conducts them separately and in single file to the part of the line that they have to occupy. Platoons are widely separated if going over open ground. As the incoming platoons enter the trench, they line up directly in the rear of the men who are to be relieved, who are "standing to" on the fire step with all their equipment on. On the command "stand down" the relief takes the place of the outgoing party.