Having followed the current thread on Warren,it will probably be another mystery as to the course of events involving the shot fired that finally alerted Warren to the danger on the union left. What there can be no doubt of is the actions taken by Warren to insure that the round tops and the left flank of the AOP would be held. Without Warren's action in getting troops to LRT to stop Hood,July 2nd at Gettysburg may have gone done as a great confederate victory. Regardless of who ordered the shot fired,Warren will always be remembered(and rightly so) as the savior of Little Round Top.
Amen, Gunny... once he saw the danger, however he saw it, he hustled tail to get LRT covered. He helped drag a couple of Hazlett's guns up the hill, and even got wounded for it. At that point in time, no one else was going to do the work of getting troops there or as quickly.