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 also fought back the enemy cavalry at the battle of Heliopolis. He played a major role in the taking of Bulal and Cairo.