On the pretext of the Kinmon Incident, the shogunate government carried out the First Choshu Expeditions, but at the same the combined fleet of Great Britain, United States, France and the Netherlands made a counterattack and got to land to occupy the gun battery (the Shimonoseki Bombardment).
禁門の変を理由に幕府は、第一次長州征伐を決行、同時期に、英米仏蘭4ヶ国艦隊の反撃に遭い、上陸され砲台を占拠された（四国艦隊下関砲撃事件）。