
Originally Posted by
Gumball
Well in FOTS it is, not sure about vanilla shogun 2, but its not exactly what you describe
There's a garrison stationed at each castle-town who's quality depends on the type of castle you have. As you upgrade the castle, more garrison units are added, and have more experience. It also works as you described, they can't be moved around, they're permanently in the castle. When besieged, the units will fill up slots in addition to any field army you have stationed there.