In each legion, there would be 10 cohorts. Cohort I would be composed of the most elite units of a legion and would be double strength compared to the other cohorts. Cohorts II, IV, VII, IX would be the newest and weakest cohorts in a legion. Cohorts III, and V would have no special title or designation, in which they would be normal and “average” soldiers. Cohort VI was made up of the “Finest Young soldiers,” which was made up of the newest and best recruits. Cohort VIII was created for “Specially Marked Soldiers,” which would be made up of not the best but fine soldiers. The last cohort was made up of the second best soldiers, who would be waiting to be promoted to the first cohort.
(Image via romanmilitary)
The Roman Empire 
I especially enjoyed the chart explaining how the ranking and structure of the roman army worked. This leaves a glimpse of the history that we sometimes never really observe or compare to how our own cultures exhibit similar traits. While you do explain the structure, I would like to see some observations that would relate to how this fact exists in our own society. I want to see how important the structure is to our on society is today.