The Mino Triumvirate (西美濃三人衆, Nishi-Mino Sanninshū, lit. Western Mino's Order of the Three) was commanded by three Japanese samurai generals serving Saitō clan during the Sengoku Period:
They had served under Saitō Dōsan, Saitō Yoshitatsu, Saitō Tatsuoki and later served under the command of Oda Nobunaga
References
Mino Triumvirate Wikipedia(Text) CC BY-SA