@paninid yeah he and Grant made an incredible pair in terms of sharing that mechanistic, determined, rigorous way of thinking about war, which leaned hard into the Union advantages and minimized the few Confederate strengths. You've likely read the Chernow bio of Grant but if not I give it highest marks. Once those two were ascending the command ladder, the only chance the Confederacy had was a Lincoln election loss in '64. In a meaningful sense they invented modern industrial warfare.