Archaeological evidence indicates that, during the final halfcentury of the life of the city, the area directly annexed by the military was significantly larger than the original excavators realized. In addition to concentrations of soldiers around the gates and defences, and at various places within the ‘civil’ town, the military came to control a single continuous swathe of the urban interior, comprising the entire N part of the walled area from the W defences to the river cliffs, and extending as far as the S end of the Citadel, plus the floor of the inner wadi right down to Lower Main St opposite the (by Durene standards) showy C3 bath, which it also apparently built. This area totals c.13.5 ha (c.33 acres)—a literal quarter of the intramural area which today covers c.52 ha (c.118 acres, measured from the CAD plan of the city by Dan Stewart; both city and base were slightly bigger in antiquity, before loss of the River Gate and parts of the Citadel). In its final form, the base included several distinct zones (Pl. XXIII). The NW part of the city had become a military enclosure, bounded on the E side by a continuous wall down the W side of G St, incorporating the street facades of the E3 bath and E4 house. On the S it was defined by the ‘camp wall’ from the city defences to D St; with no sign of a wall across blocks F5 or F7, the perimeter between D and F Sts is inferred. It must be presumed that, as to the W, the 8th-St-fronting properties of the two blocks were taken over, but that the party walls comprising the boundary with civil housing to the S was not further elaborated. These lines converged on the amphitheatre, which formed the corner of the enclosure. This perimeter of the NW enclosure involved physically blocking Wall, A, C, D, and 10th Sts. A major entrance was on 8th St, at G St between the amphitheatre and the E4 house.