buttressed — any external prop or support built to steady a structure by opposing its outward thrusts, especially a projecting support built into or against the outside of a masonry wall.
entrenched — (of an attitude, habit, or belief) Firmly established and difficult or unlikely to change; ingrained.
garrisoned — a body of troops stationed in a fortified place.
manned — carrying or operated by one or more persons: a manned spacecraft.
bastioned — Furnished with a bastion; having bastions.
strong — having, showing, or able to exert great bodily or muscular power; physically vigorous or robust: a strong boy.