榎本武揚
The film was based on the stories of Jules Brunet, a French army captain who fought alongside Enomoto Takeaki in the earlier Boshin War and Frederick Townsend Ward, an American mercenary who helped westernize the Qing army by forming the Ever Victorious Army. The historical roles of other European nations who were involved in the westernization of Japan are largely attributed to the United States in the film, although the film references European involvement as well.