His companion in arms knew how to fight defenseless women ,children and old men
You need to take a look at Grant's western campaigns which featured lots of movement, flank marches & close cooperation with the Navy. There were frontal assaults like at Vicksburg, but there were good reasons to think that he might be able to punch through.
Grant's Overland Campaign in the east was indeed less creative in the area of battles, but no less innovative in the logistical planning. If the South had a lesser commander than Lee, Grant might have won in 1864 (in the sense that Richmond would have fallen 6 months earlier).
Grant was the greatest general of the war. He captured three whole armies and beat every commander that the South sent against him. His victories in the west were legendary and in the east was the man who finally figured out how to beat Bobby Lee.