At the beginning of the establishment of the Eastern Han Dynasty,the concept of border management in the northern border defense changed from the troublesome four barbarian tribes of the former Han Dynasty to guarding the four barbarian tribes on the borders.The reasons for this change included the need of the Eastern Han government to strengthen centralization,the decision-making system of border issues,and the pressure brought by the northern nomadic peoples.The Eastern Han government set up officials to supervise the barbarian tribes who surrendered,used barbarian soldiers to control barbarians,and moved border residents in order to achieve the effect of guarding the four barbarian tribes.In general,the implementation of the strategy of guarding the four barbarian tribes on the borders in the northern border defense was a response to the changes in the internal and external environment at that time.Its implementation achieved the effect of consolidating the northern border defense and reducing national fiscal expenditures.
Eastern Han DynastyGuarding the Four Barbarian Tribes on the BordersNorthern Border Defense
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