In 1751, it was retitled 5th Regiment of Dragoons and in 1756 it became the 5th (or Royal Irish) Regiment of Dragoons. As such, it served in Ireland and had the honour of leading the charge against the rebels at the Battle of Enniscorthy in May 1798 during the Irish Rebellion of 1798. However, its troops were accused of treachery: their accusers claimed their ranks had been infiltrated by rebels. Following an investigation, it was found that a single individual, James M'Nassar, had infiltrated the regiment: he was ordered to be "transported beyond the seas". According to "Continental Magazine":