What criteria/themes from Yojimbo are you using?
* Two warring factions;
* Locals are distrustful of the protagonists;
* The protagonists are outsiders from where the module takes place;
* The only ones willing to help the protagonists are themselves outsiders;
* The individual members of the warring factions are incompetent and despicable, the real danger comes from their numbers;
* The warring factions can be played against each other;
* The protagonists are seen as unstoppable badasses;
* The protagonists are morally weary, but can be reminded of their ideals.