The contubernium was the smallest organised sub-subunit of soldiers in the Roman Army and was composed of eight legionaries, essentially the equivalent of a modern squad, although unlike modern squads, contubernia seemingly had no tactical significance in Roman military organization or battle. It was likely used to maintain morale and group solidarity by keeping soldiers in close contact with each other. The men within the contubernium were known as contubernales. Ten contubernia, each led by a decanus experienced soldier who assumed leadership when there were no orders from above, were grouped into a centuria of 100 men, which was commanded by a centurion. Soldiers of a contubernium shared a tent, equipment and a mule for transporting supplies, and could be rewarded or punished together as a unit.