Answer: conestogawagons

AnswerCrossword Clue
CONESTOGAWAGONS

Predecessors of the Superchief.

CONESTOGAWAGONS

"Ships of inland commerce."

CONESTOGAWAGONS

Frontier vehicles.

CONESTOGAWAGONS
Early prairie sights
CONESTOGAWAGONS
Trek vehicles
CONESTOGAWAGONSFormer transports on the way west
CONESTOGAWAGONSEarly Appalachian crossers
CONESTOGAWAGONSPioneers' transports
CONESTOGAWAGONSPioneer vehicles