The Illinois-Wabash Company, formally known as the United Illinois and Wabash Land Company, was a company formed in 1779 from the merger of the Illinois Company and the Wabash Company. The two companies had been established in order to purchase land from Native Americans in the Illinois Country, a region of North America acquired by Great Britain in 1763. The Illinois Company purchased two large tracts of land in 1773; the Wabash Company purchased two additional tracts in 1775. - Source: Wikipedia