Decanus - "foreman") - a commander for 10 people who lived in one tent-8 soldiers and 2 non-combatants, as well as servants or slaves. All of them were contubernia. The Dean was chosen from the Contubernium by the members of the Contubernium - most often the most experienced warrior. He was responsible for the discipline of the soldiers both on the march and in the camp. He had no special tactical role on the battlefield.