High Quality Content by WIKIPEDIA articles! Native American gambling enterprises are gambling businesses operated on Indian reservations or tribal land in the United States. Indian tribes have limited sovereignty over these businesses and therefore are granted the ability to establish gambling enterprises outside of direct state regulation.In the very early 1970s, Russell and Helen Bryan, a married Chippewa couple living in a mobile home on Indian lands in northern Minnesota, received a property tax bill from the local county, Itasca County. The Bryans had never received a property tax bill from the county before.