[@Saint Girralo] This'll be clearer when I get more of the lore up but Orcs aren't stupid mindless beasts despite what their pictures might look like.

Look on the Map, Vi'Zur has four other towns in fairly close proximity, one of which is a fortress with one would assume trained and well outfitted soldiers. Orcs attack towns for very specific reasons, for resources, to kidnap certain people or because a demon told them to. While Demons might like mindless carnage they're not going to send loyal followers into a death trap for no reason. Loyal followers to demons are uncommon, while the demons might not care too much about keeping orcs alive they're not going to send them to their graves without a reason or the orcs might stop following the demons.

I realize that kind of thing might not have been obvious since I haven't put all the information up yet and for that I apologize but unless their is something very rare and very valuable in Vi'Zur that orcs or demons desperately need and can't get anywhere else there is no reason they'd be foolish enough to attack that particular town.