Regiments were constantly being formed, more by automatic than independent process. This is seen from the fact that every boy of about sixteen was required to serve as a cadet at the _kanda_ within whose jurisdiction his father's kraal happened to fall. Every two years or so, when the lads were old enough to be formed into a regiment, they were "collected" from the various _amakanda_, and marched off to the King for inspection, when the latter gave them their new or regimental title. The destination of the new regiment depended on circumstances. It might, if numerous, be directed to go to some district and build and live in a _kanda_ of its own, or it might be ordered, wholly or in part, to serve at one or more of the already existing _amakanda_, where, of course, they would profit by the older men's experience. Thus, at these barracks one frequently found men of various ages, notwithstanding that recruitment had invariably taken place on the basis of age. It was from the fact of cadets being "collected" that the word _ibuto_ (regiment) was probably derived. The _amakanda_ were designed and built in accordance with a plan common to all. For instance, the barracks of a regiment, according as they were on the right or left side as one entered the principal gate below, were technically described, so with various other sections of such right or left side, down to the gate referred to or up to the King's harem at the top. Thus, it was possible for any soldier to define exactly where he belonged, even though the rows of huts were three or more deep. In the case of the largest regiments, _e.g._ Tulwana, the men, according to the portions occupied, would be given distinguishing names. Thus, in Tulwana, one found the Zisongo, Mkingoma, etc., divisions on the right, whilst Amabunsumana, Ingoye, etc., were on the left--each of them, by the way, nearly as large as an ordinary regiment. The principal motive for keeping up this huge organization, once the safety of the State was assured, was for attacking neighbouring tribes, generally on the slightest pretext, and making them subject to the State by looting as many of their cattle as possible. This, in fact, was but another expression of the mercenary ideal which even civilized nations of to-day seem to keep before them. Until an age between thirty-five and forty had been reached, the warriors were not permitted to marry or even to associate with girls. Nor might girls marry men of any age until special authority had been given. Girls, too, were "collected" into classes, though not required to serve at any _kanda_.