Idea: the unit Nagamasa attacked was a battalion commanded by Arthur, thus making him responsible for Jack's mentor's death. Arthur would of course not know who Jack is, but I expect it would not be too hard for a person, hungry for vengeance for the murder of his friend, to find out the name of the commander of a battalion. It would lead to a fun dynamic when our characters eventually meet.


Perhaps the small gang has been troubling Arthur's reluctant pacification attempts, so there would be some initial tension going the other way, too.