... had to fall back. But Colonel Wharton soon afterward dismounted half of his regiment and, throwing it forward on foot, drove his adversary from the position. The falling back of Sherman's and McClernand 's troops under stress from several brigades of Hardee's corps with a part of Ruggles's division of Bragg's, aided by some of Polk's troops, left Wallace (W. H. L.) on the advanced Federal right, wher...