The route west of Staunton was built about 100 years later as a toll road, the Staunton-Parkersburg Turnpike. In the second quarter of the 19th century, it became a major gateway into Virginia's "Trans-Allegheny" region, which presented much greater challenges to transportation than did less rugged portions of the state. In that region, navigable waterways were unavailable and canals impractical. Wheeled vehicles in the form of wagons, and later, motor vehicles needed to pass through with passengers and freight. It became part of the main trade route for salt and other commodities in the early 19th century. As the American Civil War broke out, the route became very important and was defended by Stonewall Jackson's troops at the Battle of McDowell in 1862.