Outpost (military)
In military terminology, an outpost is a location where detachments of military personnel are stationed at a distance from the main armed force or formation in a region. Outposts are usually located in remote or sparsely populated areas, positioned to observe and defend against unauthorized intrusions and surprise attacks, serving as the first line of defense. The station occupied by such troops, usually a small military base or settlement in an outlying frontier, limit, political boundary or in another country. Its oldest known use dates to the 16th century: "station when on duty, a fixed position or place", from French poste, meaning "place where one is stationed."
Outposts can take many different forms, but share the features of being enclosed or otherwise separated from their environment and being regularly staffed by some sort of protective force. In some cases, these outposts develop satellite communities such as mining towns or frontier settlements in the area that outpost protects.