Note 145 — THE AUXILIA DURING THE FIRST TWO CENTURIES A.D.

The diplomata of 133, 138, 148, 149, and 154 (D. xlvii, li, lx, lxi, and lxv) contain, on an average, ten regiments each. Four regiments are always present, and five more occur in four diplomata out of the five. This makes it sufficiently clear that, on the theory given above, the auxilia of the same legion must always be referred to, particularly in view of the immobility of the frontier troops in the second century (see below, pp. 114-16), which forbids the supposition that the same regiments would appear first attached to one legion, then, after a few years’ interval, to another.