After returning to the west of the Rhine, the chasseurs almost doubled in size during a successful recruiting campaign from German Lorraines.

The mounted chasseurs' uniform consisted of half-scarlet pelisse, hussar boots, and a red crew adorned in the corners with three yellow fish, by allusion, with doubt, in the name of Fischer; they were armed with a rifle, a pair of pistols, and a sabre.

In 1760, it protected the posts of La Roër, and distinguished itself particularly at the Battle of Kloster Kampen where it defended the abbey.

On 27 April 1761, Fischer decided to cede his legion to the Marquis of Conflans, who followed in his predecessors' footsteps.

[2][3] The foot chasseurs consisted of; coat, jacket, and breeches of green with red trim, red collar, 2 gold epaulets, long pockets, yellow buttons, 3 on each pocket, green cloth cap for the chasseurs, and a bearskin cap for the grenadiers.

The mounted chasseurs uniform consisted of a green jacket and pelisse, red breeches, yellow buttons, flap on each sleeve, in read cloth, garnished with a small aurora border, and a black cap.

[1][2] Just three months after formation, the regiment saw service during the Battle of Villinghausen, and pursued the army of Prince Ferdinand of Brunswick, who had decamped Soëst.

On the 20th, the regiment fought remainders of the main allied army near Ibbenbüren, and kidnapped some 40 prisoners.

The regiment then detached from the main French army and occupied the city of Osnabrück and captured some 400 horses and 800 food wagons.

On 22 June 1762 the regiment took part in the Battle of Recklinghausen, where it captured 40 horses and took 200 prisoners, among which were a colonel and a major.

Therefore, on 1 January 1791 the regiment became the 4éme Régiment de Hussards (Saxe) in an effort by the National Assembly to remove the old strains of monarchy and the 'foreign troops'.

Because of the majority of the regiment were composed of Germans from the nearby Duchy of Palatinate, almost all of the officers and men emigrated on 4 May 1792.

By September 1792, following the disastrous Battle of Valmy, the Army of the Princes was disbanded, and the regiment passed into Austrian service.