What was the payment made by one land of people to the ruler of another in order to gain the protection of that ruler?

The payment made by one land or group of people to the ruler of another for protection is commonly referred to as "tribute." This practice was often used in historical contexts where a weaker state or community would pay a stronger one to ensure safety from invasion or aggression. In return for this tribute, the dominant ruler would offer military protection and maintain a level of order in the region. Tribute systems were prevalent in various cultures and empires throughout history.