The Ancient Romans were able to maintain the loyalty of people in the lands they conquered by granting Roman citizenship to loyal subjects, acting as a protector and allowing a degree of religious and political freedom in the acquired territories. Romans were also encouraged to settle in the conquered lands and help spread Roman ideals and culture to the indigenous people in the new territories.
Ancient Rome often relied on an alliance system in the lands it acquired. In this system, the inhabitants were allowed to rule themselves and not become involved in Roman life, but were considered an ally of Rome and expected to lend military support to Rome when called upon to do so. This enabled Rome to call up vast manpower and resources when it needed to protect its territorial holdings.