Yeah, I don't think Cadet Bone Spurs is particularly knowledgeable about the Civil War. He has a plaque commemorating a Civil War battle at one of his golf clubs. The battle never actually took place:
When informed that historians claimed this never took place, Trump responded, "How would they know that? Were they there?" Which of course makes one wonder how exactly Trump would know, since he also wasn't there. He was unable to name the historians he claimed had told him the site was known as the River of Blood, when asked. His only proof was his claim that the area was "a prime site for river crossings. So if people are crossing the river, and you happen to be in a civil war, I would say that people were shot – a lot of them."