The Imperialists, discouraged by the fall of their general, could not withstand the ardour with which the Swedes and Scottish infantry attacked them, and the cavalry rode from the field. Elsewhere the battle was still raging. Wallenstein’s right and centre had driven Count Bernhard, the Duke of Brahe, and Kniphausen across that desperately contested road, but beyond this they could not force them, so stubbornly and desperately did they fight. But Stalhaus and his men, refreshed and invigorated by their victory over Pappenheim’s force, again came up and took their part in the fight. Wallenstein had no longer a hope of victory, he fought now only to avoid defeat. The sun had already set, and if he could but maintain his position for another half hour darkness would save his army.
He fell back across the road again, fighting stubbornly and in good order, and extending his line to the left to prevent Stalhaus from turning his flank; and in this order the terrible struggle continued till nightfall. Both sides fought with splendid bravery. The Swedes, eager for the victory once again apparently within their grasp, pressed on with fury, while the Imperialists opposed them with the most stubborn obstinacy.
Seven times did Piccolomini charge with his cavalry upon the advancing Swedes. Seven times was his horse shot under him, but remounting each time, he drew off his men in good order, and in readiness to dash forward again at the first opportunity. The other Imperialist generals fought with equal courage and coolness, while Wallenstein, present wherever the danger was thickest, animated all by his courage and coolness. Though forced step by step to retire, the Imperialists never lost their formation, never turned their backs to the foe; and thus the fight went on till the darkness gathered thicker and thicker, the combatants could no longer see each other, and the desperate battle came to an end.
In the darkness, Wallenstein drew off his army and fell back to Leipzig, leaving behind him his colours and all his guns. In thus doing he threw away the opportunity of turning what his retreat acknowledged to be a defeat into a victory on the following morning, for scarcely had he left the field when the six regiments of Pappenheim’s infantry arrived from Halle. Had he held his ground he could have renewed the battle in the morning, with the best prospects of success, for the struggle of the preceding day had been little more than a drawn battle, and the accessions of fresh troops should have given him a decided advantage over the weary Swedes. The newcomers, finding the field deserted, and learning from the wounded lying thickly over it that Wallenstein had retreated, at once marched away.
In the Swedish camp there was no assurance whatever that a victory had been gained, for nightfall had fallen on the Imperialists fighting as stubbornly as ever. The loss of the king, the master spirit of the war, dispirited and discouraged them, and Duke Bernhard and Kniphausen held in the darkness an anxious consultation as to whether the army should not at once retreat to Weissenburg. The plan was not carried out, only because it was considered that it was impracticable — as the army would be exposed to destruction should the Imperialists fall upon them while crossing the terrible morass in their rear.