...to a Major-Generalship directly after the affair at Iuka — had been left in chief command at Corinth by Grant, who had returned to his own headquarters at Jackson, withdrawing Ord's division to Bolivar . Rosecrans had in and about Corinth not far from 20,000 men — too few to man the extensive works constructed around it by Beauregard, when lie held that position against Halleck's besieging a...