This was when a shogun of Omi army HATA no Kimi Yakuni and his son HATA no Ushi, followed by other members of Hata family, changed sides to support Oama no Miko.
このとき、近江の将軍羽田公矢国とその子羽田大人らは己の族を率いて大海人皇子側に寝返った。