États généraux du royaume des Pays-Bas
On 29 October 1736, Elliott was promoted to the rank of Colonel, taking over the colonelcy of the Carabinier Regiment on 1 February 1737, and the Dragoons Regiment on 10 July 1738. In 1737, Elliott was appointed Cavalry General of the States General of the Netherlands, the legislature of the Dutch Republic. A few years later, he was working at Lunéville, at the court of the exiled King Stanislaus I of Poland who had become Duke of Lorraine and Bar. On 22 April 1745, he was promoted to Major-General of Cavalry for the Elector Palatine; on 24 June 1746, to Lieutenant-General of Cavalry, and, on 2 November 1748, to Lieutenant-General of Cavalry for the States General of the Netherlands.