When trying to order my Cuirassier to take one step forward alongside a mountain, he instead insists on taking a detour through two different tunnels and an enemy city center: Predictably, the move doesn't actually go through if I release the button. Instead, nothing happens, which means it's impossible to get my unit onto that hex. Next up, trying to attack the enemy AT Crew with a different Cuirassier. Again, my man can't seem to resist the allure of those mountain paths. And since you can't attack from a mountain, this move also doesn't go through. Let this be a warning for those attempting to invade the Inca in the future - you'll end up lost in the Andes.