based their power on matrimonial alliances with the Throne; the Taira, the Minamoto and the Tokugawa based theirs on the possession of armed strength which the throne had no competence to control. There another broad line of cleavage is seen. Throughout the Fujiwara era the centre of political gravity remained always in the court. Throughout the era of the Taira, the Minamoto and the Tokugawa the centre of political gravity was transferred to a point outside the court, the headquarters of a military feudalism." The process of transfer was of course gradual. It commenced with the granting of large tracts of tax-free lands to noblemen who had wrested them from the aborigines (Yemishi) or had reclaimed them by means of serf-labour. These tracts lay for the most part in the northern and eastern parts of the main island, at such a distance from the Capital that the writ of the central government did not run there; and since such lands could be rented at rates considerably less than the tax levied on farms belonging to the state, the peasants by degrees abandoned the latter and settled on the former, with the result that the revenues of the Throne steadily diminished, while those of the provincial magnates correspondingly increased. Moreover, in the 7th century, at the time of the adoption of Chinese models of administration and organization, the court began to rely for military protection on the services of guards temporarily drafted from the provincial troops, and, during the protracted struggle against the Yemishi in the north and east in the 8th century, the fact that the power of the sword lay with the provinces began to be noted. The Taira and the Minamoto.