Pre-Columbian Indian Macro-Cultures:  Great Plains
     The pre-Columbian Great Plains were virtually uninhabited.  The exceptions to this were:

1.   Small bands of Apacheans were slowly wandering to the Southwest from Canada following the eastern slope of the Rocky Mountains and arriving in the Southwest about A. D. 1500.

2.   Pawnee and Wichita tribes may have been on the plains as river cultures which were essentially like the Eastern Woodlands except for housing.