Contubernium (from Latin contubernium, "shared tent") was the smallest tactical unit of the Ancient Roman army. It consisted of 8-10 individuals under the command of a decanus. They lived, ate, drank, and fought together. During campaigns, the members of a contubernium would be accommodated in the same tent. In barracks, they would be assigned to the same room, also known as a contubernium. Ten contubernia made up a century.