However, the alliance with Catholic France was deeply unpopular and England withdrew from the war after the 1674 Treaty of Westminster. Anxious to keep his French subsidies, Charles encouraged Dumbarton and other members of the Brigade to remain in French service during the 1672-1678 Franco-Dutch War. Charles created him Earl of Dumbarton and Lord of Ettrick in 1675 but neither came with estates and Dumbarton complained they simply cost him large amounts of money; in 1677, Louis appointed him Maréchal de camp or Lieutenant General in the French Army.