Heiji Rebellion
The Minamoto were one of the four great clans that dominated Japanese politics during the Heian period (794-1185). They were, however, decimated by the Taira in the Heiji Rebellion of 1160. Minamoto no Yoshitomo had been the head of the clan at this time; upon his defeat at the hands of Taira no Kiyomori, two of his sons were killed and the third, Minamoto no Yoritomo, was banished. Following the call to arms of Prince Mochihito and Minamoto no Yorimasa in 1180, the clan would gather together and rise to power again. The Genpei war would see the Minamoto clan defeat the Taira and take command of the entire country.