Original sentence: Controversy still surrounds his actions at Fort Pillow, and his reputation has been marred by his involvement in the first incarnation of the Ku Klux Klan.Forrest is remembered both for positive and negative events in his life.Forrest will also be remembered (and by many, reviled) for his controversial associations with the Ku Klux Klan
Edited sentence: " Forrest will also be remembered (and by many, reviled) for his controversial associations with the Ku Klux Klan.History will remember Nathan Bedford Forrest for the debacle and massacre at Fort Pillow, however true it may be that had been following already established Confederate precedents when he ordered the killing of "all captured blacks [surrendered or not] wearing a Union Army uniform