In December 1711 the government controversially dismissed Lord Marlborough, a notional Tory but long supported by the Whigs, as Captain General and replaced him with the staunchly Tory Irish general the Duke of Ormonde. Ormonde took the field as commander of the British forces in Flanders in 1712, but received "restraining orders" from Harley forbidding him from committing troops to fight the French. Ormonde marched his troops away from the Allies, now commanded by Eugene of Savoy, who suffered a major defeat at the Battle of Denain without the assistance of the British. Marlborough was also dismissed from his post in the cabinet Master General of the Ordnance, a position that was handed to the Scottish Tory Duke of Hamilton. Hamilton was also appointed as the first British Ambassador to France following the war, but before he left for France he was killed in a notorious duel in Hyde Park with the Whig politician Lord Mohun.