On the 26th of August His Royal Highness was detached to support the corps under Prince Eugene of Wirtemberg, posted near the fortress of Königstein; and Prince Leopold maintained, with his cavalry, a precarious position for five hours, against the repeated attacks of a force treble his own numbers, by which he defeated the designs of the enemy, and preserved Prince Eugene's troops from destruction. On the following day the corps took post beyond Pirna, which place the enemy took by storm, and endeavoured to extend with his cavalry upon the level ground near the Elbe; but was driven back by the troops under Prince Leopold. The main army, however, retired towards Bohemia, by which the retreat of the corps near Pirna was rendered difficult, and the abilities of His Royal Highness were particularly conspicuous in the masterly dispositions and skilful movements of the cavalry under his orders, in facilitating and covering the retrogade movement of the corps. A sharp action occurred in the village of Peterswalde on the 29th of August, when His Royal Highness signalized himself; several other actions occurred on the same day in the mountains, and towards the evening, the Prince repulsed the attack of a superior force near the village of Prisen, with signal bravery and astonishing success; and on the following morning he received from the Emperor Alexander the Cross of the military order of St. George. The action was renewed on the 30th of August, and the allied army having been concentrated, the French were defeated with considerable loss. Prince Leopold had a distinguished share in the engagement, and he pursued the retiring enemy to the village of Peterswalde: the brilliant conduct of His Royal Highness between the 26th and 30th of August, was rewarded by the Emperor of Austria with the military order of Maria Theresa.
Prince Leopold had a distinguished post at the battle of Leipzig, and, with the cavalry under his orders, contributed materially to the decisive termination of that gigantic contest. His Royal Highness was actively employed in the beginning of 1814; was at the battle of Brienne, and in the pursuit of the defeated army on the 2d of February, and in several minor affairs. On the 25th of March the Prince was in the action with the French at La Fere Champenoise, when, attacking the enemy's right flank at Caunentrai, he carried the position, captured five pieces of cannon, and, when attacked in turn, he repulsed the enemy, and maintained his ground with signal intrepidity. The battle of Paris concluded the campaign, and on the 31st of March, the Prince entered that city with the cavalry of the reserve, and remained there in garrison. These important events were succeeded by the abdication of Napoleon, and, when the Congress assembled at Vienna, Prince Leopold of Saxe-Coburg conducted the business relating to his own country.