Possible Clues:

• Cowboys quarterback Prescott
• N. ___ (Fargo's state, for short)
• Black Hills terr
• S. ___ (Neb. neighbor)
• Cowboys QB Prescott
• N. or S. state
• Terr. split in 1889
• Shoe brand
• ___ Terr., 1861-89
• U.S. territory divided in 1889