Hijikata Toshizō
The code of the Shinsengumi, famously created by Hijikata Toshizō, included five articles, prohibiting deviation from the samurai code (Bushido), leaving the Shinsengumi, raising money privately, taking part in others' litigation, and engaging in private fights. The penalty for breaking any rule was seppuku. In addition, if the leader of a unit was mortally wounded in a fight, all the members of the unit must fight and die on the spot and, even in a fight where the death toll was high, the unit was not allowed to retrieve the bodies of the dead, except the corpse of the leader of the unit.