Conestoga wagon

The Conestoga wagon is a specific design of heavy covered wagon that was used extensively during the late eighteenth century and the nineteenth century in the eastern United States and Canada. It was large enough to transport loads up to six short tons (5.36 long tons; 5.44 tonnes), and was drawn by horses, mules, or oxen. It was designed to help keep its contents from moving about when in motion and to aid it in crossing rivers and streams, though it sometimes leaked unless caulked.

Most covered wagons used in the westward expansion of the United States were not Conestoga wagons but rather ordinary farm wagons fitted with canvas covers, as actual Conestoga wagons were too heavy for the prairies.