Sakura Wars is a Japanese multimedia franchise which originated with a series of RPGs created by Ouji Hiroi and published by Red Entertainment and Sega.
Taking inspiration from the Shochiku Revue and Takarazuka Review, Sakura Wars is set in a fictional Taisho-era 1920s with a definite steampunk spin. Following an incident in 1918 known as the Kouma War when a demon appeared in Nihonbashi and was eventually sealed away by the Imperial Army Counter-Demon Team, the Imperial Capital Defense Program and the Imperial Assault Force were created.
Kanzaki Heavy Industries starts researching Koubu - dual-powered steam/spirit armor - and a top secret corps is installed underneath the Grand Imperial Theater in Ginza where the women of the Imperial Assault Corps Flower Division live out a cover life putting on shows as the Imperial Opera Troupe or Imperial Revue. This model having proved successful, the program was replicated in Paris with the Paris Assault Force at the Theatre Chattes Noires, and the New York Fighting Troupe at Broadway’s Little Lip Theater.