In 1798 Craufurd was sent as Deputy Assistant Adjutant General on General Lake's staff to quash the Irish rebellion against General Humbert. His abilities were recognised by Generals Cornwallis and Lake who reported well of his performance to the War Office. A year later, due to his German language skills, he was British commissioner on Suvorov's staff when Russia invaded Switzerland. At the end of 1799, Craufurd was on the staff in the Helder Expedition led by the Duke of York.