In large armies, however, organization by Army Corps is unavoidable. We therefore naturally find the forces of the great military powers of Europe--Germany, France, Russia, Austria, Italy--organized by _Army Corps_, while the forces of Turkey, Japan, Great Britain, and the smaller nations of Europe are organized by _Divisions_ only. Switzerland is about to comply with this principle by transforming her present Army Corps into Divisions. COMPOSITION OF AN ARMY CORPS An Army Corps is generally composed, after the German model, of two Divisions, in spite of the ruling of Clausewitz that a division of any Unit into two parts is the worst possible. This is admitted by von der Golz in his “Nation in Arms,” and also by von Schellendorf in his “Duties of the General Staff.” Both agree that an Army Corps should have _three_ Divisions, but think that it would be difficult to alter a system so deeply rooted in Germany. This criticism applies also to the bipartite organization of both Cavalry and Infantry Divisions and Brigades, which exists in most Continental armies. The Austrians have therefore adopted a Corps of three Divisions, and the Germans and French think of adding a Reserve Division to the two forming their Army Corps. To have three Divisions would undoubtedly strengthen the Command of the _Corps_, and, by reducing the number of Corps, facilitate that of the _Army_. Besides the Infantry Divisions, there are other troops in an Army Corps--namely, Cavalry, Artillery, Engineers, and Administrative Services. _Corps Cavalry._--The French have a _Brigade_ of Corps Cavalry, the Russians a _Division_. This is probably a better arrangement for providing “protective Cavalry” than to rely only on the few squadrons of _Divisional_ Cavalry, as in Germany and Austria. _Corps Artillery._--German and Russian Army Corps have no Corps Artillery; other armies have two or more Brigades, organized in Regiments. Heavy Artillery is likely to be allotted to Army Corps or perhaps to Armies, in foreign armies, as it is in England to the Division. _Corps Engineers._--A Company or two, with an Engineer Park of tools and stores, a Bridging Train, and Telegraph Units, form the Corps Engineers. The _Corps Administrative Services_ comprise in most armies an Ammunition Park, a Supply Park, a Field Bakery, Field Hospitals, and a Remount and Veterinary Depôt. 3. CAVALRY CORPS