One hundred and forty-seven years ago, lines of blue advanced on a hillside near the outskirts of Fredericksburg. Those heights were manned by gray-uniformed soldiers, powerfully well-armed and rather surprised that the Union commander should send wave after wave of troops into their maelstrom of cannon and rifle fire. What followed was a slaughter about which Confederate General Robert E. Lee said, "It is well that war is so terrible...we should grow too fond of it."