The previous chapters, describing the Units of the various Arms, and their grouping into the larger Formations, give only the broad lines of the organization of the Army. The detailed composition or _Establishment_ of each Unit is shown in a table giving the numbers of Officers and Non-Commissioned Officers by their ranks, of men according to their various functions, and of horses--riding, draught, and pack. These numbers make up what is termed the _Strength_ of the Unit. Similarly, there are laid down Establishments for the larger Formations, which are given in tables showing the Head-Quarters, the numbers of Units of fighting troops and the Administrative Services, and the total numbers of personnel and animals, according to their various categories. It is convenient to add to these Establishments a statement of the _Transport_ of each Unit or Formation, showing the guns, wagons, and carts, of all descriptions, with the drivers and animals required. The Strength given in Establishments represents the total numbers of men and animals drawing rations daily in the field, and may be termed the _Ration Strength_. It is often summed up as so many “officers” and “other ranks” (or so many of “all ranks”) and horses. The _Fighting Strength_ means the number of men actually available for fighting, and the number of guns horsed and manned. The Fighting Strength is generally reckoned as so many _rifles_, or men fighting on foot, so many _sabres_, or mounted fighting men, and so many _guns_. The number of men with the guns is not included in the fighting strength, nor are officers, Staff Sergeants, or Drivers. But all Cavalry officers, even the Commanders and Staff, might strictly be counted as “sabres,” as they actually fight with the same arm as the men, which Infantry officers do not. It will be observed that in the larger Formations there is a great discrepancy between the _Total Strength_ and the _Fighting Strength_. This is due to the numbers of men employed for non-combatant functions, or in the auxiliary services, and of horses required for transport. Thus, in a German Army Corps the total strength is 41,000 men, 14,000 horses, and 2,400 vehicles; while the fighting strength is 25,000 rifles, 1,200 sabres, and 126 guns. In the British Cavalry Division the total strength is nearly 10,000 men and horses, and 550 vehicles; while the fighting strength is under 6,000 sabres, with 24 machine guns and 24 guns. Tables of War Establishments furnish a complete statement of the Organization for war. On them are founded the necessary calculations for mobilizing the peace army, for its transport by sea or rail to the theatre of war, and for its supply with food, ammunition, clothing, and stores.