Owing to the enormous amount of food required for an army, the main function of the Transport is to carry _supplies_, so that the connection between Transport and Supply is a very intimate one. It has been found desirable, therefore, to amalgamate the administrative units which effect these two services. Those who are responsible for providing food should also be responsible for moving it. The administrative units of the combined services of Transport and Supply are provided by the Army Service Corps, as shown in detail in the next section of this chapter. The Officers of this Corps are trained both for Transport and Supply duties. Their identical training and their organization together in one unit tends to produce co-operation in both services of Transport and Supply, and should minimize any chance of failure in war. The fact that all officers are interchangeable between these services also gives an elasticity to the system which is wanting when they are separate. REGIMENTAL TRANSPORT The Transport with the Units in the field is called _Regimental Transport_, in distinction from the Transport on the Lines of Communication, and consists of two categories: (_a_) Transport of Fighting Units, including all Head-Quarters. This Transport is divided into _First Line_, and _Second Line_, Transport. (_b_) Transport of Administrative Units--_i.e._ Ambulances, Supply Columns, and Supply Parks. (_a_) _First Line Transport_ forms an integral part of each fighting unit; the unit provides its own drivers and superintendence for its transport, which accompanies it at all times. The First Line Transport carries on wheels (or by pack) all that the unit requires for fighting--namely: guns, ammunition, entrenching tools--besides signalling, medical, veterinary, and other technical equipment. _Second Line Transport_ for all units is provided by the A.S.C., to carry the baggage, supplies, stores, and water which the unit requires to have with it when at rest. This transport is not required for fighting, and, when near the enemy, does not accompany its unit, but is all massed in rear of the fighting troops, but able to rejoin its various units in a few hours. The water carts alone may at times accompany the troops. The stores carried include cooking utensils and butchers’ implements, artificers’ tools and material, office books and stationery; also, when specially required, blankets, tents, and fuel. The supplies carried are indicated later in the description of the _Supply Service_ which follows. Transport for each Head-Quarters is all furnished by the Army Service Corps (A.S.C.). (_b_) Transport of Administrative Units.--This is provided also by the A.S.C., and is described in the two following sections of this chapter, under the heading of the Supply Services and Medical Services. TRANSPORT ON THE LINES OF COMMUNICATION