Changing Allegiance
The Boshin War, featured in Fall of the Samurai, was a time for clans to decide where their loyalties lay – to the Shogunate or to the Emperor: to the status quo or to the future. As such, clans in the game can either be pro-Shogunate or pro-Imperial. Every clan begins the campaign already aligned, and you must spread your influence to get their support. Shinsengumi or ishin shishi can spread a clan's influence simply by their presence in a province. Leaving them in place will eventually lead to a declaration of allegiance. Once a clan declares their allegiance they must fight for the cause they have chosen.
Click here to view a video tutorial about this subject.