The Function of political Marriages in regulating of the relations of Concurrent Governments 4th/10 -7th/13 centuries (based on general histories)

Political marriage was a prudential connection between ruling families and was regarded as an effective method to achieve important governmental goals. This type of marriage became more popular from the fourth century AH onwards, simultaneously with the formation and development of semi-independent governments in Iran. Needed to establish the peaceful relations and to take advantage of the opportunities ahead, the rulers used them to solve the complex and political equations. About the role of political marriages in regulating the relations of governments from the 4th to the 7th century AH, so far has not been conducted any coherent and thematic research, especially based on public histories. The Findings of this research show that some of the Abbasid caliphs, the semi-independent governments of Al-Buwayhids ,Ghaznawids, Seljuks, Qarakhanids and some local governments have benefited the most from it. The results show that governments usually established marital ties to maintain position, confronting the enemy, deepening the friendship, the peace and security, expanding the territory, and rarely threatening and humiliating. The main function of these marriages was to facilitate, guarantee and complete the agreements and sometimes was the only solution of it. The present article will explain the evidences of political marriage in regulation of the relations of governments with a descriptive-analytical method.