The Aizu Domain and the Satsuma Domain joined forces to influence the emperor to postpone the Imperial Trip to the Yamato Province and to dismiss the Choshu Domain, who were guarding the Imperial gates (Coup of August 18).
会津藩と薩摩藩が結んで孝明天皇を動かし、大和行幸の延期と長州藩の御門警護を解任してしまう（八月十八日の政変）。