...e, held the right of the army, the object of the whole plan being to turn Lee's left. Sumner, never hesitating to obey orders, at once put his men into the affray and learned that Mansfield's and Hooker 's commands were being exhausted. Heavy firing was heard on the left as the regiment advanced across the creek, but Burnside, who was at the left, did not press the work there and the weight of Lee...