The political _security role and position of Khorasan fortresses during Afsharian

The consistency and protection of Khorasan state's social life was fully dependent on the fortresses due to some elements such as boundary position and Afgan,Tatar, Torkaman group's plunder. In addition to the establishment of military stability of the government,such a fortresses were a place to conduct commercial _agricultural activities and also to store foodstuffs and military procurement. Regarding the importance of the topic, the present research answer the question that what was the role of Khorasan fortresses in social life during Afsharie? In order to answer this question we test the hypothesis that the important functions of castles such as protection of people's lives and property,establishing political stability caused the different claimants of throne made particular endeavors to strengthen and to provide procurement in domestic castles and surrounding satellite  ones as their government's center of gravity. Using historical method and collecting library data from first _hand resources,this research described and classified military and political transformations related to Khorasan. Finally it analyzed these features and influences on the throne's claimant empowerment.