Special care must be taken to keep rockets in good condition. Supplies are kept in the fire line (platoon leaders’ posts, observations) and at points in the rear (in the observatories or different command posts or in the observation posts of the information service). =Depots and Supply.= (_a_) Depots:—There should be one general depot in each area located near the command post of the chief of area. However, in order to facilitate work in the first line the platoon leaders may establish near their post a small depot of tools and material being used for the time being. The importance of the depot depends upon the area it is to supply. For example, the depot of the garrison of a support point in the first line would contain: 20,000 cartridges 1,000 hand grenades 400 rifle grenades 100 each—signal and illuminating rockets 60 to 70 gas masks 100 shovels 100 picks Sandbags, planks, barbed wire, etc. The depot at the center of resistance contains the same articles but in greater number, also telephone wire, blankets, and three days’ rations of food. The main depot of the position, however, is the one near the command post of the leader of the sector. It is divided into three parts: 1. Ammunition and rocket signals (Ordnance Service). 2. Material of every sort (Engineer Service). 3. Food and clothing (Quartermaster Service). The different services in the rear of the position maintain the supplies of the sector depot. The amount of ammunition to be carried is fixed by orders from the general and this amount must be strictly maintained. [Illustration: _Organization of Supply System._] (_b_) Requests for Supplies: Each morning the chiefs of areas send in a request for material required for the next night’s work. All these requests in a sector are grouped by a staff officer under the heads of the three different services. Along with each request must go the information showing necessity for same. Emergency requests are made by telephone. The officer making request for material must be on hand to receive and check the same upon delivery.