Grant wasn’t stupid. Only fools believed people who had willingly joined a union from which the could not with draw. Only fools still believe it today.
Can’t remember exactly how many years it was, but I know some of the northern states had threatened to leave the union some 20 to 40 years earlier. Just liberals, I guess they believed it was OK if the did it, but other people. LOL!
It seems that Lee and Grant were both of two minds fighting Mr. Lincoln’s War.