...ed his promotion 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...