Sulutak is the closest settlement in the Orcish plains to Akheta, and is also close to the war front against the elves. As such it naturally evolved into being a bustling slaving and military city. In fact, it is the largest slaving city in the entire Illumian empire. When one has the drive to buy and sell people, Sulutak is the place.
There are three Sulutaks, effectively. The inner walls contain a rich and and powerful Illumian community, mostly comprised of those who have made their money off of slaves. Within the next wall is the military distract, containing barracks, training, and soldiers. Finally, on the outer edges, with no walls at all, are the Orcs and petty slavers, living in tents and in ramshackle buildings that are easy to tear down and put back up in a moment’s notice. Most of the powerful, rich traders on the inside never interact with their slaves or the people who sell them, instead hiring salesmen, paying them, and never coming into contact with the dirty outside.