...eir assault. Bragg knew it was Sherman's troops that had crossed, and, they being so long out of view, may have supposed that they had gone up the north bank of the Tennessee River to the relief of Knoxville and that Longstreet was therefore in danger. But the first great blunder, detaching Longstreet, cannot be accounted for in any way I know of. If he had captured Chattanooga, East Tennessee would ha...