The Roman Army was organized into military units comprised of the Roman Legion and the Auxilia.  The Legion was Roman citizens, and was about 6,000 men strong.  The Auxilia was organized of non-citizens, and a large variety of kinds of troops.  During the reign of the Roman Empire, the number of Roman Legions ranged from a low of 25, to a high of about 35 legions.  The division of the legion was split into 10 cohorts, and a cohort was split...