In 1796, while Morlot's soldiers were garrisoning Aachen and its district, he was involved in a dispute with a government official and suspended from command.

In 1808 when Emperor Napoleon invaded Spain in the Peninsular War, Morlot was given a division of recruits.

On 7 December 1782 he joined the artillery of the French Royal Army, serving until 28 September 1790.

At the outbreak of the French Revolution, he was elected captain in the 3rd Battalion of the Moselle Volunteers.

[1] At Thionville from 3 to 5 September 1792, 3,000 to 4,000 French soldiers successfully held the city against an army of 20,000 the Habsburgs and Émigrés.

To put the French effort in context, on 2 December Verdun had surrendered to a Prussian army after a trifling resistance.

[3] The Battle of Kaiserslautern from 28 to 30 November 1793 saw him leading a brigade in Lazare Hoche's Army of the Moselle.

Ultimately, the French withdrew with 2,400 killed and wounded plus 700 men and two guns captured.

[4] During the battle Morlot led five battalions in an assault on a position defended by infantry and many cannons.

Forced back by superior numbers, he was able to avoid being trapped by enemy cavalry and resume his unit's place in the battle line.

[1] Morlot was active in the relief of Landau[1] which successfully resisted a blockade from 20 August until 23 December 1793.

[1] On this day in the Battle of Lambusart, 41,000 Austro-Dutch repelled the attack by Jean Baptiste Jourdan's 73,000-man army with 3,000 casualties and the loss of eight guns and 40 munitions wagons.

[9] During the battle, Morlot's troops resisted the attacks of Peter Vitus von Quosdanovich's column.

When Jean Etienne Championnet's neighboring division faltered, Morlot personally led a bayonet charge that saved the situation.

[1] During the battle, Jourdan's 81,000 French troops defeated the 46,000-man Austro-Dutch army under Prince Josias of Coburg.

[12] While engaged as governor of Aachen and the lands between the Meuse and Rhine Rivers, he came into conflict with the director general of the military police.

The soldiers were all untrained draftees and the officers were all half-pay men or brand-new sous lieutenants.

The 6,500 soldiers of the Spanish 5th Division arrived just in time to blunt the attack on the Cerro de Santa Barbara.

Morlot's front line brigade suffered heavy losses, but he sent one battalion up a ravine that the defenders neglected to watch.

Noting that the battalion had gained a foothold on the crest, he pushed forward reinforcements and soon the Spaniards were fleeing in rout.

On the second day, the divisions of Morlot and Charles Louis Dieudonne Grandjean successfully captured Monte Terrero.

[24] By the 28th the French had captured a large section of the city wall and the rest of the siege involved bitter street fighting.