The substitutes begin operating as members of the Shinsengumi. Their first job is escorting Sakuma Shozan. However, something seems to have happened between Sakuya and Shozan in the past...
I believe Shozan-sensei knows a 
bit about the art of war as well.
Credo che il maestro Shozan abbia
 una certa padronanza dell'arte della guerra.
Acredito que o mestre Shozan conheça
um pouco sobre a arte da guerra também.
Как я понимаю, вы кое-что
знаете об искусстве войны.