1189 - Yoritomo defeated MINAMOTO no Yoshitsune and the Oshu Fujiwara clan who harbored Yoshitsune (eliminated rival samurai forces by mobilizing samurai throughout the nation).
1189年（文治5年）-頼朝が源義経とこれを匿った奥州藤原氏を滅ぼす（全国の武士を動員し、対抗しうる武家勢力を排除）。