What was the overall vision or approach to command and strategy in Ulysses S Grants actions as overall military commander of the Union?

Answer 1

Grant had Meade hold Lee in check while Sheridan destroyed the crops, commodities, communications, and logistical supplies of Lee's army, in the East. In the West, Sherman destroyed Atlanta, and, in his March to the Sea, did the same thing as Sheridan, on a large scale, eliminating the South's capacity to conduct the conflict, in essence, starving Lee's army into submission, and preventing any other Confederate forces from coming to his relief.