Taishōgun were used with varying degrees of responsibility, although none of them had equal or more importance than Seii Taishōgun. Some of them were: History First shogun There is no consensus among the various authors since some sources consider Tajihi no Agatamori the first, others say Ōtomo no Otomaro, other sources assure that the first was Sakanoue no Tamuramaro, while others avoid the problem by just mentioning from the first Kamakura shogun Minamoto no Yoritomo. Heian period (794–1185) Originally, the title of Sei-i Taishōgun ("Commander-in-Chief of the Expeditionary Force Against the Barbarians") was given to military commanders during the early Heian period for the duration of military campaigns against the Emishi, who resisted the governance of the Kyoto-based imperial court. Ōtomo no Otomaro was the first Sei-i Taishōgun. The most famous of these shoguns was Sakanoue no Tamuramaro. In the later Heian period, one more shogun was appointed. Minamoto no Yoshinaka was named sei-i taishōgun during the Genpei War, only to be killed shortly thereafter by Minamoto no Yoshitsune. Sakanoue no Tamuramaro Sakanoue no Tamuramaro (758–811) was a Japanese general who fought against the Emishi tribes of northern Japan (settled in the territory that today integrates the provinces of Mutsu and Dewa). Tamarumaro was the first general to bend these tribes, integrating their territory to that of the Yamato State. For his military feats he was named Seii Taishōgun and probably because he was the first to win the victory against the northern tribes he is generally recognized as the first shogun in history. (Note: according to historical sources Ōtomo no Otomaro also had the title of Seii Taishōgun). Kamakura shogunate (1192–1333) In the early 11th century, daimyō protected by samurai came to dominate internal Japanese politics. Two of the most powerful families – the Taira and Minamoto – fought for control over the declining imperial court. The Taira family seized control from 1160 to 1185, but was defeated by the Minamoto in the Battle of Dan-no-ura. Minamoto no Yoritomo seized power from the central government and aristocracy and by 1192 established a feudal system based in Kamakura in which the private military, the samurai, gained some political powers while the Emperor and the aristocracy remained the de jure rulers. In 1192, Yoritomo was awarded the title of Sei-i Taishōgun by Emperor Go-Toba and the political system he developed with a succession of shoguns as the head became known as