PHILADELPHIA — If Todd Babcock had his way, the Mason-Dixon Line would be known as the technological marvel that kept Philadelphia in Pennsylvania, not as flawed shorthand for the Civil War ...

Part of West Virginia’s northern border with Pennsylvania is a straight line that runs east and west along what is known as the Mason-Dixon Line. Traditionally, especially in the 19th century and the ...

Part I: Marchlands in Motion. Lord Baltimore's Northern Problem -- William Penn's Unlikely Empire -- The Battle for Maryland's Far North -- Part II: Marchlands into Borderlands. The Squatters' Empire ...