The Philadelphia, Wilmington & Baltimore Railroad was created through the merger of four earlier railroads: the Philadelphia and Delaware County Rail-Road Company; the Baltimore and Port Deposit Rail Road Company; the Delaware and Maryland Rail Road Company; and the Wilmington and Susquehanna Rail Road Company. The new line formed a single road between Philadelphia and Baltimore. The Pennsylvania Railroad took control of the company in 1881 following a fight with the Baltimore & Ohio Railroad. In 1902, the Pennsylvania Railroad merged the Philadelphia, Wilmington and Baltimore and the Baltimore & Potomac railroads to create the Philadelphia, Baltimore & Washington Railroad.
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