Wounded and distinguished again at Wachau, he still took part in the battle of Hanau, where his horse was killed under him.

On 2 February 1814, he distinguished himself again at the Battle of Montmirail, and the following day was made général de division.

On 19 March that same year, he impetuously attacked the enemy rearguard, captured a group of pontoons and closely pursued the Allies.

During the Hundred Days, general Letort offered his services to Napoleon, who accepted and put him in command of the dragoons of the Imperial Guard.

Impatient to see this corps escaping, Napoleon ordered his aide-de-camp Letort to take four service squadrons of the Guard and charge the enemy vanguard.