After the levy of troops in 1569, they attacked Gassan Toda-jo Castle which was protected by Takashige AMANO on Mori's side and attempted to drive the Mori clan out of Izumo Province.
旗揚げの翌年（1569年）には、毛利方の天野隆重が守る月山富田城を攻め、出雲国からの毛利氏排除を試みた。