Note 155 — THE AUXILIA DURING THE FIRST TWO CENTURIES A.D.

This is on the supposition that the auxilia would have been drawn upon in the same proportion as the legions. Some of the regiments which remained behind seem to have been very much weakened, others such as the Ala Picentiana and the Ala Batavorum probably remained fairly intact. Tac. Hist. ii. 89, iv. 15, 18, 62. Vitellius may have had some of the British auxilia with him (cf. Tac. Hist. ii. 100, iii. 41), but these are more than counterbalanced by the eight Batavian cohorts which had been sent back.