Stonewall's silent allyUnfinished railroads figured in at least four major eastern Civil War battles: Chancellorsville, Gettysburg, the Wilderness and Second Manassas. Only at Second Manassas, however, did an uncompleted railroad bed actually define the battlefield--in the sense that a battle was fought there largely because of the abandoned railroad grade.
McElfresh, Earl B. "Stonewall's silent ally: a railroad to nowhere gave Confederates a tactical advantage at Second Manassas." Civil War Times, Dec. 2011, p. 54+. General OneFile, https://link.gale.com/apps/doc/A270461782/GPS?u=maine&sid=GPS&xid=19d8de5b.