Stunning anyone would go to a rally to hear this. He's not very smart.
https://www.newsweek.com/donald-trump-gettysburg-civil-war-historian-1890325
"Gettysburg, what an unbelievable battle that was," Trump said during a Saturday rally in Schnecksville, Pennsylvania, in what was his first campaign event in the battleground state. "It was so much, and so interesting, and so vicious and horrible, and so beautiful in so many different ways—it represented such a big portion of the success of this country," he continued.
"Gettysburg, wow—I go to Gettysburg, Pennsylvania, to look and to watch," he said. "And the statement of Robert E. Lee, who's no longer in favor—did you ever notice it? He's no longer in favor. 'Never fight uphill, me boys, never fight uphill.' They were fighting uphill, he said, 'Wow, that was a big mistake,' he lost his great general. 'Never fight uphill, me boys,' but it was too late," Trump added.