Abstract
The military feud emerged during the era of the Boyheed rule in Iraq in 334 AH (945 AD), the worst of the regime known to Iraq. The Boyhians and the Seljuks, the commanders and soldiers of the land and villages, were cut off in exchange for their salaries due to the lack of money. And this led to the destruction of agricultural land and left the farmer to his land, and the destruction of the system of irrigation feudal military or civilian goal only to collect money in any way. Another reason for the prevalence of military feudalism is the ignorance of the Buhayyans and the Seljuks and their tribal heritage and what they haveknowri in their country that the land is for those who settle there. When the Seljuks entered Iraq in 447 AH (1055 AD), military feudalism expanded to include all the country. This regime became more and more severe for the country and its people because the Seljuks were more prominent than the Buhayyans. The study included three researches and a conclusion. In the first part, the concepts and terminology were explained. First, it included the concept of feudalism, while the second included the origins of the Buhayun and the Seljuks. The second topic dealt with military feudalism in the Boi era. The third topic included military feudalism in the Seljuk era. The conclusion included the results of the study..
