 There was a debate about extending the northern border further north to the mouth of the Rock River (Illinois) at Rock Island, Illinois and the western boundary further west to the mouth of the Wolf River (Kansas) at White Cloud, Kansas.The additions would have made Missouri the largest state in the Union and under Congressional pressure it was dropped back to the current configuration since the lines were already marked (plus the addition of the Bootheel to accommodate the wishes of Mississippi River towns to stay with their Missouri compatriots.The state's official description was