Through the French Minister Leon Roches, he received 2.4 million dollars from France and founded Yokosuka Ironworks, a shipyard, and a ship repair dock, and he also led a revolution in the military system by inviting a group of military advisors headed by Jules Brunet.
慶喜はフランス公使・レオン・ロッシュを通じてフランスから240万ドルの援助をうけ、横須賀製鉄所や造・修船所を設立し、ジュール・ブリュネを始めとする軍事顧問団を招いて軍制改革を行った。