Gosannen War

Timeline

1. 1083Mutsu Province · TohokuMinamoto no Yoshiie took office as governor of Mutsu in 1083, attempting to mediate the succession dispute among Kiyohara no Mahime, Iehira, and Sanehira. After negotiations failed, Yoshiie intervened with private troops, and the Gosannen War began. This was not the later Izumo Rebellion of Yoshiie's son, nor was it an eastern expedition ordered by the court to Minamoto no Yoriyoshi and his son.
2. 1083–1086Mutsu Province frontier · TohokuYoshiie repeatedly fought the various branches of the Kiyohara clan in the Mutsu and Dewa areas, with assistance from Fujiwara no Kiyohira. The court regarded this as private warfare and provided limited supplies; Yoshiie often paid to reward his men at his own expense, and his martial reputation as 'Hachiman Taro' spread from this.
3. 1087Mutsu Province · TohokuYoshiie and Fujiwara no Kiyohira stormed Kanazashifunato, held by Kiyohara no Iehira and others; Iehira and others were killed, and the Gosannen War ended. The Izumo Rebellion of Yoshiie's son occurred twenty years later and was unrelated to this war.