Ambassador (B&O train) Ambassador (B&O train) The Ambassador was a named train of the Baltimore and Ohio Railroad (B&O) on its route between Baltimore, Maryland and Detroit, Michigan with major station stops in Washington, D.C. and Pittsburgh, Pennsylvania and Toledo, Ohio. Inaugurated in 1930, the "Ambassador" was discontinued in 1964. The B&O began passenger service from Detroit to Washington, D.C. in 1920. Until 1925, the B&O offered a through Washington - Detroit Pullman sleeping car running on a Washington-Chicago train to Deshler, Ohio then added to a Cincinnati - Detroit train. In June 1925, the B&O started a through overnight Washington - Detroit
Philadelphia, Wilmington and Baltimore Railroad the New Castle and Frenchtown and New Castle and Wilmington railroads, forming a branch line from Wilmington to Rodney. On May 21, 1877, it then absorbed the Southwark railroad, extending its main line to the Delaware River waterfront. In 1880, a conflict began between the PRR and the B&O, both of which operated over the PW&B. The B&O was working to reduce its reliance on PRR tracks; it had recently arranged to switch its Philadelphia-New York trains to the new Reading-controlled "Bound Brook Route," which had recently broken the PRR's monopoly on travel to New York via New Jersey. At