The strength of the Roman military was the string that held the Roman Empire together for as long as it lasted. The military was made up of strictly disciplined men whom were ready and willing to serve their emperor. The Legions Outward appearance was extremely important to the Romans and the first thing that new recruits learned was to march in perfect form. Once they knew how to march they were then assigned to the legions in which they would remain for the next 20 years of service. (the book) The legions were made up of between 5000 and 5500 men. In a legion there were 10 Cohorts and in those Cohorts there were 6 C