The sun was drooping close to the tree line as the day wound down in southern Pennsylvania eight years ago. A retired U.S. Army officer, now a historian, led a group of business people from across the nation – I was one of them – onto the hallowed ground there in Gettysburg. The national cemetery was our final stop on an afternoon-long, on-the-scene lecture about the great Civil War battle and the leadership lessons it teaches. We had walked the fields and high ground where Union and Confederate forces squared off 149 years earlier. There were places with names like Pickett’s Charge, Little Round Top and the Peach Orchard.