the robots started off for their trek. they found themselves stranded in the deserted plains of central illinois. they could see the many hollow shells of old supershopping centers. there was no heat inside the buildings except for small squirrels using the building as dwelling. the human element of the plains of illinois had long been vacant. the people had long since perished due to lack of structured systems. there were still nomadic tribes of people that would roam around. you could sometimes spot them but you really need a clear day and clean lenses. often the nomads would sleep in the undergound shelters or inside the squirrel's homes. this was dangerous procedure to sleep in the shells due to the automated Sentinel guardians that were usually on patrol.