It is thought that when the French first encountered the Illiniwek tribes, there were as many as 10,000 members living in a vast area stretching from Lake Michigan out to the heart of Iowa and as far south as Arkansas. In the 1670s, the French found a village of the Kaskaskia in the Illinois River valley (the later site of present-day Utica), a village of Peoria in present-day Iowa (near the later site of Keokuk), and a village of the Michigamea in northeast Arkansas.