A tambo was an Inca structure built for administrative and military purposes. Found along the extensive roads, tambos typically contained supplies, served as lodging for itinerant state personnel, and were depositories of quipu-based accounting records. Individuals from nearby communities within the Inca empire were conscripted to maintain and serve in the tambos, as part of the mit'a labor system. Tambos were spaced along Inca roads, generally about one day's travel apart.