In 1862, Merritt was appointed captain in the U.S. Cavalry and served as an aide-de-camp to Brigadier General Philip St. George Cooke, who commanded the Cavalry Department of the Army of the Potomac.
Merritt was appointed captain in the U.S. Cavalry. This was in 1862. Merritt was served as an aide-de-camp to Brigadier General Philip St. George Cooke. This was in 1862. Brigadier General Philip St. George Cooke commanded the Cavalry Department of the Army of the Potomac.