I think Trump should really set their hair on fire by relating who the best general America ever produced was, Nathan Bedford Forrest.
That greatness may have been tempered by this ...
In April 1864, in what has been called “...one of the bleakest, saddest events of American military history.”,[3] troops under Forrest’s command massacred Union troops who had surrendered, most of them black soldiers along with some white Southern Tennesseans fighting for the Union, at the Battle of Fort Pillow.
https://en.wikipedia.org/wiki/Nathan_Bedford_Forrest