Disaffection towards the Hōjō-led Kamakura regime appeared among the warriors towards the end of the thirteenth century. This resentment was caused by the growing influence of the Hōjō over other warrior families within the regime. The Mongol invasions were the main cause behind this centralization of power that took place during the regency of Hōjō Tokimune (1268–1284). During the crisis, three things occurred: Hōjō family appointments to the council of state increased; the Hōjō private family council became the most important decision making body; and direct vassals of the Hōjō were increasingly promoted to shugo posts. They essentially narrowed down their constituents by including only Hōjō family members and direct vassals, at the expense of a broader base of support (Varley 1971:46–50; Hori 1974:198). When a coalition against the Hōjō emerged in 1331, it took only two years to topple the regime.