Historical clue formulations

• Central Plains nation governed by the Nasharo Council — 2026-05-09
• Oklahoma tribe — 2017-05-17
• Town where "Parks and Recreation" is set — 2017-02-03
• Foe of the Cheyenne — 2017-01-15
• Plains tribe — 2002-02-02
• Indian in a tepee — 2001-12-10
• "Dances With Wolves" foe — 2000-04-29
• Plains Indian — 2000-01-18
• Oklahoma Indian — 1999-01-11
• Foe of the Sioux — 1997-04-27
• Dweller along the Platte — 1995-06-04
• Plains Indian — 1994-04-13