Garrisoning is a tactic used in urban combat. As high ground and cover are both effective measures to protect infantry, commanders often choose to send their troops inside buildings whenever possible, vastly increasing their survivability. A trained group of infantry can easily turn a civilian structure into a makeshift fortress, keeping them safe, at least as long as the structure stands; in order to increase the longevity of a building, generals may order their construction dozers or workers to repair and maintain it. Generally, about 8 or 10 soldiers can occupy one building.