I'm doubtful this is true, as well. Suspect it was taken from an incident involving four or five deserters, who were sentenced to be shot. He had them ride out to the execution spot sitting on their coffins, and they had to dig their graves then sit down on the coffins to wait to be shot. Some of the soldiers were not happy about this as they believed the men had not deserted but had gone AWOL to see about family. At any rate, they had the guns aimed and were just ready to yell, "Fire!" when Forrest appeared and called the whole thing off. He told the men they were brave and he couldn't spare them but to never do such a thing again or he would not stop their execution. There wasn't a next time!