Belliard became an officer between 1792 and 1793 under Dumouriez in Belgium. He then fought under Hoche in Italy between 1796 and 1797, near Castiglione, Caldiero, Arcole, and became a general. A participant of the 1798 Egyptian expedition, he fought in the Battle of the Pyramids, became governor of Upper Egypt, and advanced with his troops into Nubia.
He played a major role in the taking of Bulal and Cairo.
In 1805, he fought against Austria, Prussia and Russia, under Joachim Murat. King Joseph Bonaparte left Madrid with his 5,850-strong reserve on 23 July 1809 to fight at the Battle of Talavera.
Wanting to face the combined British and Spanish army with his maximum strength, the king left Belliard, the governor of Madrid, with only about 4,000 troops. Belliard"s force consisted of one brigade from the division of Jean-Joseph, Marquis Dessolles and a few pro-French Spanish troops.
There were three potential threats, a Portuguese column of unknown strength led by Robert Thomas Wilson, the Spanish Army of Louisiana Mancha under Francisco Javier Venegas, and an insurrection.
In case any of the threats developed, Belliard was ordered to withdraw into the Retiro forts for a last-ditch defense. However, Venegas failed to take advantage of his opportunity, Wilson"s force was too weak, and the crisis passed. During the Russian campaign in 1812, he fought at Dresden, Leipzig and Hanau, again under Murat.
He was severely wounded in the battle of Craonne.
After Napoleon was overthrown, Louis XVIII awarded him the title Peer of France (Pair de France). When Napoleon returned from Elba in 1815, Belliard became commander of the Mosel forces.
After the Battle of Waterloo, he surrendered to Louis XVIII, had his title Pair taken away, was imprisoned for month, but then released and reinstated as Pair in 1819. Rue Belliard in Brussels is named General Belliard, as is a street in Antwerp.