Ohoho, i'm having fun with this already. So far I have in mind a fanatical religious lot whom worship their war rigs as a pantheon of gods. They are extremely devoted, having to go through severe lengths just to declare war so that they are "blessed" for victory, otherwise they are to frightful of their gods' wrath to engage in open conflicts. I have this vibe where the leadership is well aware of the religion being fake, however they utilize it to not only inspire and motivate the populace, but also to control them.