score:6
While the concept of the barracks was in use in Roman times, the concept of a standing army fell out of use by the Middle Ages:
The use of mercenaries by the English is not surprising, since the old "feudal" system of raising armies (a system that had never really worked on a large scale) had been pretty much abandoned in Europe.
As such, knights and the like did have specialized training areas (as under livery and maintenance), but the bulk of armies was composed of mercenaries and the self-trained. This is, incidentally, why the English longbow and quarterstaff took off; the bow was already used by peasants to hunt, and the quarterstaff was popular among the peasantry for self-defense.