On July 16 in 1247, the next year of the coup, the order was issued to expel Hidetane as the adopted son-in-law of the Miura clan after the Battle of Hoji, which completely destroyed Yasumura and Mitsumura MIURA brothers; on the next day, July 17, Taneuji Osuga and Taneyuki TO (also known as Sosen, and a father-in-law of Hidetane's third son Yasuhide), who were also from the Chiba clan, attacked Hidetane's base Tairyukan in Tamazaki no sho in Kazusa Province (now Mutsuzawa town, Chiba Prefecture).
翌宝治元年（1247年）6月(旧暦)の宝治合戦によって、三浦泰村・光村兄弟が攻め滅ぼされると、6月6日(旧暦)に三浦氏の娘婿である秀胤に対しても追討命令が発せられ、翌7日には千葉氏一族の大須賀胤氏・東胤行（素暹、秀胤の3男・泰秀の義父）らが秀胤の本拠である上総国玉崎荘大柳館（現在の千葉県睦沢町）を攻撃した。