Complex sentence: However, Rokuemon's son, Senjū Tarō, quickly rushed to Yashima no Hage-tanuki who trained before him, and tried to gather together Rokuemon's defeated army again and attack Higaino.
Split into simpler sentences: However, Rokuemon's son, Senjū Tarō, rushed to Yashima no Hage-tanuki, who had trained before him. He gathered Rokuemon's defeated army again and attack Higaino.