The defining line was known as the Mason-Dixon line that starts at the southeastern tip of Pennsylvania.
the Mason Dixon line separated North & South in the US Civil war
A civil engineer.A civil engineer.A civil engineer.A civil engineer.
on the East Coast.
There was no true front line in the civil war, but the Potomac river was one of the "front lines"
The names are all 1800s Railroads: The Short Line Railroad; The Reading Railroad; and the Pennsylvania Railroad.
The Mason-Dixon Line.
Mason Dixon line
It's called the Mason-Dixon line.
A line with a point at each end is known as a segment. A line with an arrow on each end, however, is known simply as a line.
The Civil war
Flow Line