One thing I like to think it that would be also a + for Gridania in case of a war, would be the group of bandits that infest the region of South Shroud. According to the MSQ at the very least, they seem to be very protective of the territory they live, perhaps because of Buscarron, or maybe since it's a thing deep rooted in those who are born in the forest. As such, in case of war, I don't feel like it's outlandish to think the bandits, while not actually joining the military, would still be an asset for the war effort, with their more 'dishonest' methods of combat, subterfuge, sabotage, and etc.
"Forever walking forward, towards the ever distant horizon."
-Leanne Delphium