Later Three Years War begins in Japan

September 15, 1083

A succession dispute in the Kiyowara clan of northern Honshu erupted into war. Minamoto no Yoshiie, already a legendary warrior from the earlier Mutsu campaigns, intervened on behalf of one faction. His victories cemented Minamoto prestige and helped form the ethos of medieval Japanese warrior culture for centuries. The court in Kyoto refused to recognize the campaign as official, denying Yoshiie rewards for his service.