论均势理论在唐朝对吐蕃、南诏交涉战略中的体现

Abstract:Tang Dynasty had frequent negotiations as well as heavy fightings with Tubo吐蕃 and Nanzhao南诏 in southwest China. Although the relationship among these three regimes has been studied widely in the academia，this topic still has more aspects for further research. This article strive to study this relationship within the international system at that time，using the theory of equilibrium in international relations and the system of check and balance as research tools，and then explain Tang’s policies and action against the threats from Tubo and Nanzhao from the perspective of regional powers. It is believed that Tang’s strategies in southwest China can be regarded as a system of check and balance based on their own interests and security，and Tubo and Nanzhao should be regarded as their direct opponents. In different historical periods，Tang adjusted their strategic appropriately according to the changes of the situation and the threats they faced with，in order to maximize their authority in southwest China，with the strategy of balance such as military striking or political allying.

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