In 1799, Sir Ralph Abercromby led a British expedition into North Holland to break the French hold on the strategically important Scheldt estuary. Another Transport Corps, overseen by Waggon Master General Digby Hamilton, Lieutenant Colonel (later Colonel), was created to support this effort. Initially titled the Royal Waggon Corps, it was renamed the Royal Waggon Train, ranking as a "Mounted Corps" after the 29th Dragoons. Due to the success of Abercrombie's expedition, the Royal Wagon Train of five Squadrons was reinforced by a further seven Squadrons/troops and Hamilton was promoted to Major General.