I have a simple thought about Gettysburg an a "what if". .My thought is: What if the confederacy had develop the "Creeping Artillery Barraged" that was develop in WW! by the British. They had the knowhow and the artillery may not have been best suited for it but it could have done the job. Plus, the union army would have had no knowledge of the concept so the union army would have been caught off guard. If Lee would have use the artillery tactic of a "Creeping Barrage" would that have made a difference in Pickett's charge? Could it have saved the day for Lee that July day in 1863..