Related Clues:

• Territory initially including Idaho
• Douglas C-47; Siouan language
• Territory from 1861 to 1889
• Territory that became states in 1889
• Old plane satisfactory in a little soaring
• Stats about fine retired plane
• "Fifty Shades of Grey" star Johnson
• Indigenous people for whom two U.S. states are named
• Crazy Horse and Red Cloud's people
• Territory that lent its name to two states
• Natives of Iowa and Nebraska
• Language with a Yankton dialect
• Nebraskan Native Americans
• Certain Sioux
• Tribe whose flag features a circle of tepees on a red background