A loose and ragged band of berzerkers, barbarians, criminals and vagabonds, the Blood Wolves have all come together to a dual purpose. Each of the Wolves are beholden and worship the same patron Little God, the Crimson Slashing Jaw. They are also a semi-cohesive mercenary force for hire. Their rates are low, and their morals are non-existant.
A military organization, the Stalkers are a hunting/mining militia that are known for wearing full body shrouds that easily hide them in snow and other slushy terrain. The lightly armored warriors are known for the speed, stealth, and the vicious wounds inflicted by their hunting hatchets. Many of the Stalkers keep crop-eared warhounds with them, both for hunting, companionship, and in war.
In a savage area, the bodies of the dead are cremated, and their ashes are placed in a hollowed out pod like a gourd or a coconout and tossed into a river to bring good luck to the tribe.
Orcs record their deeds through symbolic mutilation, scarring and tattoo. Perhaps creating the medium of skin as art, which humans followed later. Perhaps tattoos remind the elves of orcs and make them angry...
After the PCs defeat (or force the rapid retreat of) a villanous necromancer/demon summoner, they discover a book. This book outlines how to summon a demon whose power increases according to the size of the summoning circle used to summon it. And after the PCs examine a map of the country, they find that the layout of the cities and roads match up with the required summoning circle. In fact, the final road that would complete the circle is currently in construction.
With anyone who can find out about the circle and the ritual to summon the demon able to somehow make the final road/line, and destruction of the cities and roads currently in existence out of the question (unless this is an evil campaign- that removes the moral quandary), how are the PCs going to solve this problem?