>>211688359 (OP)I used to live there (here
>>211689076). There's a divide between the western half ("West River") and the eastern half ("East River"). East River has mostly German ancestry, the biggest city (Sioux Falls), and farmers. It also contains the majority of the population. West River has a large Native American (Lakota) minority, and its white people are Euromutts. Its poor soil means its economy is based on ranching instead of farming.