when a person enlists into the military they would be initially assessed as to their suitability to the type of unit he/she will be trained for, once selected they would go to a training depot/barracks/unit to undergo basic skills such as drill basic weapons instruction etc before going on to do their specialist training for infantry, para, armour, artillery etc, on completion they would then be filtered out to those units which have a priority for replacements and any new units being formed, any remaining manpower is then tasked with continuous training and/or other duties such as sentry work, escorts, PR etc, as far as units in fighting they are normally allocated as units rotate into and out of action