[[Intercalary months|int.]]4/20, Aizu troops occupied [[Shirakawa castle]]. A [[Choshu|Chôshû]] samurai [[Sera Shuzo|Sera Shûzô]] who stationed the castle then was assassinated in Fukushima same day. [[Intercalary months|int.]]4/25, the imperial troops attemted to take over the castle but were defeated. | [[Intercalary months|int.]]4/20, Aizu troops occupied [[Shirakawa castle]]. A [[Choshu|Chôshû]] samurai [[Sera Shuzo|Sera Shûzô]] who stationed the castle then was assassinated in Fukushima same day. [[Intercalary months|int.]]4/25, the imperial troops attemted to take over the castle but were defeated. |