However, the foreign vessels fought back at the end of the same month and occupied the gun battery in Choshu (the Battles of Shimonoseki); actually, this incident provided a good opportunity for the Choshu clan to reconsider how difficult it would be to expel foreigners.
しかし同月末に外国船に反撃され、砲台を占拠されるなど、実際には攘夷の困難さを身をもって知ることとなる（四国艦隊下関砲撃事件）。