Study On The Political Relations Among The Sassanids Persia With Tang Dynasty And Arab Empire

With the clue of the Sassanids Persian latter history and the development after it was ruined, this dissertation mainly studies the political relations among the Sassanids Persia, Arab Empire and Tang Dynasty from 610 AD to 750 AD. Furthermore, on the basis of the study, the dissertation tries to find out some characteristics and rules. At that time, Persia,Arab Empire and Tang Dynasty are all superpowers in the world, their conflicts and intercourses in Central Asia influenced not only on historical development each but also on political developing road of the whole Asia Continent.In the introduction, I illustrate the significance of this subject, the purpose of my research. I also review the researching situations in the field of the political relations among the Sassanids Persia, Arab Empire and Tang Dynasty, and point out many scholar's viewpoint, materials used, and methods of research. Then I show my own perspective of research, materials used, the rough frame and the principle contents of the dissertation, the emphasis and the difficulty of my research.In Chapter I, I illustrate the causes why the mighty Sassanids Persia turned a feeble country when Khosrau II (610-632 AD) was Emperor. During this period, the Sassanids kept relative peace with each Arab tribe. But it allied with Sui and Tang because of their same enemy-Turkey. On communications between Tang Dynasty and Arab Empire this period, I can hardly see any records about it.In Chapter II, I indicate the struggle that Persia resisted Arabian conqueror when the last emperor of the Sassanids Yazdigird III ( 632-651 AD) was in the stage. Persia went extinct gradually in nearly twenty years. In the purpose of retrieve its independence, Persia sent its messengers frequently to Tang for reinforcements. At the same time, Arab Empire also sent its messengers to Tang, informing that the Sassanids was terminated, trying finding out real strength of Tang Dynasty and its policy on Central Asia..In Chapter III, during the period of 651-677 AD, I analyze that the remainders of the Sassanids under the leadership of Peroz II disputed with Arab Empire in the east border of the Sassanids. They contended with Arabian from good to critical situation because Arab Empire put out its inner turbulence. In this part, I also put forward that great changes have taken place on the attitude Tang Dynasty treating Persian's requests, then I give some reasons about it. Arab Empire abandoned its effort about sending its messengers for the moment because this action affected little. In Chapter IV, I research that Narses reached Central Asia to continue to lead the reconstructive movement of Persia from 678 AD to 707 AD. This period can be divided into two by the year that Qutayba was appointed Khurasan governor of Arab Empire. At first, Persian's force of reconstructing country expanded their influence in Transoxania and impelled the second climax of reconstructing movement. But then Persian's strive to reconstruct country experienced a totally failure because of the furious offensive of Arab Empire. The relation between Arab Empire and Tang Dynasty deteriorated because of profit conflicts in Transoxania.In Chapter V, I dissertate the last endeavor of Persia against Arab Empire under the leadership of Khusrau III during the period of 707-750 AD. Although they still communicated with tang Dynasty, they lost their central position because their power became much weaker. Tang mainly supported Turgesh to confront Arab Empire. Arab Empire sent its messengers to Tang frequently to alienate the relation between Tang and Turgesh.In Chapter VI, I analyze characteristics of political relation between the three countries during the course that they conflicted in Transoxania. Through this, I concluded some rules of ancient countries' communications. I think the political relations among three countries can be concluded into three traits: adhered friendliness, such as Persia (including countries in Transoxania) and Tang Dynasty; opposite warfare, such as Persia (including countries in Transoxania) and Arab Empire; contended collision, such as Arab Empire and Tang Dynasty.