Because the warriors of Aizu could not fulfill their duties, the Shinsengumi was also incorporated under the Shugoshoku being retained by the Shugoshoku and were assigned to maintain order in the town.
また、会津藩士のみでは手が回りきらなかったため、守護職御預かりとして新選組をその支配下に置き治安の維持に当たらせた。