Yellow River (Indiana) larger and joins the Kankakee across the border in Illinois. The Kankakee River joins the Des Plaines River south of Joliet, Illinois, forming the Illinois River. Together they flow the length of the state of Illinois before joining the Mississippi River, north of St. Louis. Main Poc was a warrior and chief among the Yellow River Potawatomi first coming to notice at the Treaty of Greenville (July 1795), which was to bring peace to the frontier. Within a year, Main Poc was leading raiding parties across the Mississippi into Spanish Territory. By 1804, Main Poc and Turkey Foot were raiding
Southern Illinois River-to-River Conference approached by Benton, Herrin, Harrisburg, and West Frankfort for membership; these four schools were concerned over their small size relative to the other members of the South Seven Conference (where all four were then located) and sought out a conference more in line with their size. Massac County (then an independent school) was approached about becoming a member, and in 1993 the Southern Illinois River-to-River Conference was formed. At the start of the 2010-2011 school year Carterville left the Black Diamond Conference to join the Southern Illinois River-to-River Conference. Chester High School has taken their place in the Black Diamond