How Do Roman Soldiers Sleep in Barracks?

Most of our evidence comes from an anonymous treatise, possibly dating to the fourth century. It states that when the roman armys on campaign, a century of 80 men sleep ate in a tent. So this is basically our only evidence. The rest is just guesswork. But we looked hard for chemical evidence for horse dropping and found nothing. And there was no headquarters building in the fort at bear's den initially. so it's very possible that soldiers are outposted from the adjoining fort to besdan a.