In April 1793 Robe went to Holland with the artillery under Major Wright, part of an advanced force of the Duke of York's army for the Flanders Campaign, the main body of artillery under Sir William Congreve embarking in May. Robe took part in the siege defence operations at Willemstad, with which the English share of the campaign commenced. He was appointed, in addition to his ordinary duties, acting adjutant and quartermaster, and at the instance of Congreve, he was made inspector of ammunition. Robe was at the Battle of Famars, the Siege of Valenciennes, the Battle of Caesar's Camp, the Siege of Dunkirk, the Siege of Landrecies, and the operations near Tournay, including at Lanoy and Roubaix. He took part in the retreat into Holland, and was particularly engaged at the bridge of Waerlem and at Nimeguen in October and November 1794, returning to England towards the end of November.