"I think Ulysses S. Grant is vastly underrated as a man and as a general. I know people think this and that about his drinking habits, which I think have been exaggerated way out of line. The fact is, he never demanded more men or material from the war department, he took over an army that had a long history of retreating and losing. That army had no confidence in their fighting ability and Grant came in as a real outsider. He had so many disadvantages going into the 1864 campaign, now 100 years ago. But he met every test and rose to the occasion unlike I’ve ever seen in American history. He was a very tough yet very fair man and a great soldier. He’s not been given his due...Grant devised a strategy to end the war. He alone had the determination, foresight, and wisdom to do it. It was lucky that President Lincoln didn’t interfere or attempt to control Grant’s strategic line of thinking. Lincoln wisely left the war to Grant, at least in the concluding moves after he came east. Grant is very undervalued today, which is a shame, because he was one of the greatest American generals, if not the greatest."
Earlier in 1956, when Richard Nixon told Eisenhower that it was common knowledge Stonewall Jackson was the greatest Civil War general, followed by Lee, Eisenhower interrupted him:
"I wouldn’t say that, Dick. In fact I think it’s not a very reasoned opinion. You forget that Grant captured three armies intact, moved and coordinated his forces in a way that baffles military logic yet succeeded and he concluded the war one year after being entrusted with that aim. I’d say that was one hell of a piece of soldiering extending over a period of four years, the same time we were in the last war.”
Obviously Eisenhower admired both men. And there was much to admire about each of them.
The dissing of Grant is all part and parcel of Southen mythology to cover up the fact that they lost a war (which they had little chance of winning anyway). Southern historians practically invented historical revisionism as we know it today, per Alan Bloom and yours truly.