As far as I am concerned Grant's entire career is an Alternate ASB perversion of the way it should have worked. Small town layabout living on family charity becomes the all conquering hero that saves the nation? How much more ASB can you get, until you get to the career of Romell anyway?
In the real time line Grant is canned, Hallek takes over and the Vicksburg campaign drowns in the Mississippi swamps. And of court the whole Chattanooga battle is too ASB for words. In real life Rosecrans is obliged to surrender the whole army and Longstreet marches to Cincinnati.