No historical evidence locates Confederate Gen. Thomas “Stonewall” Jackson on what is now Liberty Farm in Fauquier County, Virginia, on the evening of July 18, 1861, three days before the First Battle of Bull Run. So why would a prestigious state preservation group represent that as a fact? The current owner of the farm, Martha Boneta, has sued the Piedmont Environmental Council, a nonprofit land trust, accusing the organization of knowingly making a false historical claim when selling her the property. The environmental council, Boneta claims in the lawsuit, told her the celebrated Civil War general bivouacked on the open...