Bertie was promoted lieutenant-general in 1798 and general in 1803. In 1804, the Duke of York recommended him for the colonelcy of the 77th Regiment of Foot, then part of the Indian establishment, noting that "the difference of emolument is of great consequence" to Bertie.
Bertie was promoted to lieutenant-general in 1798 and general in 1803. In 1804, the Duke of York recommended him for the colonelcy of the 77th Regiment of Foot, which was part of the Indian establishment, emphasizing that "the difference in compensation is of great significance" to Bertie.