In June 1814, de Watteville was transferred briefly to the Richelieu River sector, but on 8 August, he was appointed to command the "Right Division" on the Niagara River in Upper Canada (succeeding Major General Phineas Riall who had been wounded and taken prisoner by the Americans at the Battle of Lundy's Lane).
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In the 1812 War he was an officer in the British-controlled Swiss Regiment De Wattville.