The West Virginian, later known as the Potomac Turbo and Potomac Special, was a daily passenger train operated by Amtrak between Washington, D.C. and Parkersburg, West Virginia. This route was previously served by the Baltimore & Ohio's (B&O) train of the same name, and was the first of several services in the state of West Virginia established at the behest of US Representative Harley Orrin Staggers (D-West Virginia), the powerful chair of the House Interstate and Foreign Commerce Committee. This patronage earned the train the derisive sobriquets "Harley's Hornet" and the "Staggers Special".

On its startup on May 1, 1971, Amtrak did not retain any of the three B&O intercity trains then operating west of Cumberland, Maryland. Commuter services between Washington, D.C. and Martinsburg, West Virginia continued unaffected. The situation displeased Staggers, through whose district the B&O route ran. Responding to pressure from Staggers, Amtrak introduced the West Virginian on September 8, 1971, between Washington and Parkersburg, West Virginia. It was Amtrak's first train on the B&O. The train operated with ex-Chesapeake and Ohio Railway equipment: a 52-seat coach and a snack-bar coach.

On February 7, 1972, Amtrak transferred one of its two UAC TurboTrain trainsets, then on the Turboservice between New York City and Boston, Massachusetts, to the Parkersburg run. Amtrak characterized this as an experiment to see how well the TurboTrain could run on a mountainous route and whether new equipment could reinvigorate ridership on a poor-performing route. Amtrak dubbed the re-equipped train the Potomac Turbo.

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