Prince Oama's army led by MURAKUNI no Oyori moved forward and opened war at Okinaga no Yokokawa on August 8 and after that, marched into enemies with a series of victories.
村国男依らに率いられて直進した大海人皇子側の部隊は7月7日(旧暦)（8月8日）に息長の横河で戦端を開き、以後連戦連勝して進撃を続けた。