However, the Tsu clan in Oyamazaki switching to the new government army and shelling the former bakufu army in Hashimoto caused the former bakufu army completely collapsed and decided the outcome of the battle.
しかし、大山崎に布陣していた津藩が新政府軍に寝返って橋本の旧幕府軍を砲撃した事で旧幕府軍は総崩れとなり、戦いの趨勢が決している。