Counterfactuals always leave a bitter aftertaste. What if Grant had not been available to fight the Civil War? Would it have ended the way it did? Would it have ended at all?
Grant himself had the most humble and fatalistic view of his contribution to the war. Were he to observe events of the modern day, he would perhaps shrug and reach for the bottle and another cigar. He would answer the call if it came, but with only limited enthusiasm. Those who died on his command were many. Those who conquered bore harsh wounds.