D'Aoust was provisionally appointed
general of brigade in the
Army of the Eastern Pyrenees on 2 June 1793. He was provisionally appointed
general of division by representatives Joseph Fabre and Reymond Gaston on 7 August and assumed command of the camp near
Perpignan. This was a difficult time to be a general in the eastern Pyrenees. The Spanish army captured the
Fort de Bellegarde, a major fortress, when the
siege ended on 24 June. Previous commander Claude Souchon de Chameron was in prison and
Louis-Charles de Flers joined him when he was arrested on 6 August. Both Souchon and de Flers were guillotined in 1794 during the
Reign of Terror. To make matters worse, the Spanish commander
Captain General Antonio Ricardos was a capable opponent. Believing that Ricardos' Spanish army was unstoppable, Hilarion Paul de Puget-Barbantane moved his headquarters well to the rear on 4 September 1793, putting d'Aoust in charge of Perpignan. On 11 September, Barbantane fled to
Toulouse, leaving the
Army of the Eastern Pyrenees without a commander. The army briefly separated into three independent divisions and d'Aoust took command of the 1st Division. On 17 September, d'Aoust won a significant victory at the
Battle of Peyrestortes. He led his troops in an attack on
Juan de Courten's 6,000 Spanish soldiers at the Camp of Vernet. Other French troops under
Jacques Gilles Henri Goguet attacked
Peyrestortes hill, where
Jerónimo Girón-Moctezuma, Marquis de las Amarilas deployed his division. After heavy fighting that lasted into the night, the French inflicted a major defeat on their opponents. Spanish killed, wounded, and captured numbered at least 1,702, and 26
cannon were captured. More importantly, the Spanish never seriously threatened Perpignan again. On 18 August, d'Aoust became subordinated to
Luc Siméon Auguste Dagobert, the new army commander. A few days after the French defeat at the
Battle of Truillas on 22 September, Dagobert was arrested and d'Aoust became the army commander. On 3 October, d'Aoust with 16,000 men engaged Ricardos and 15,000 Spanish troops at
Le Boulou on the
Tech River. The Spanish won the battle, inflicting losses of 400 killed and 800 wounded on their enemies while suffering only 300 casualties. During and after the battle, 1,500 French soldiers deserted. Between 11 October and 21 November,
Louis Marie Turreau became the new army commander and d'Aoust went back to command the 1st Division. D'Aoust temporarily led the army again from 22 to 27 November until the inept but politically influential
François Amédée Doppet took command from 28 November to 20 December. On 7 December, d'Aoust advanced with 10,000 troops to surprise the enemy camp at
Villelongue-dels-Monts. Ricardos with 3,000 Spanish and 5,000
Portuguese soldiers, repulsed the French attack. The French counted 340 killed and wounded, and 312 missing. In addition, 26 cannons, 2 colours, and 2,000
muskets were captured by the Allies. The Allies reported only 56 casualties. ==Execution==