United States' concept of a reservation had not been used by the Spanish, Mexicans or other Apache neighbors before. Reservations were often badly managed, and bands that had no kinship relationships were forced to live together. No fences existed to keep people in or out. It was not uncommon for a band to be given permission to leave for a short period of time. Other times a band would leave without permission, to raid, return to their homeland to forage, or to simply get away. The military usually had forts nearby. Their job was keeping the various bands on the reservations by finding and returning those who left. The reservation policies of the United States produced conflict and war with the various Apache bands who left the reservations for almost another quarter century.