Born on a farm in Putnam County, New York, on
July 23,
1823, (some sources list 1822) Darius Couch didn't have far to go to get to his college,
West Point. It was less than 50 miles due west of his family's homestead. He received a brevet during the
Mexican American War but left the army a lieutenant in 1855. Over the next five years he worked in his wife's family's business in Tauton, Massachusetts. It was his classmate,
George McClellan who promoted the former lieutenant to brigadier general on
August 9,
1861 (with rank from May 17). Couch spent the first few months of his military career training men to fight in the
Army of the Potomac.
...
Following the end of the Seven Days, Couch requested to be relieved of duty because of illness. McClellan did not send the request to Washington, but promoted Couch to Major General with rank from
July 4,
1862. After returning to Aquia Point, Couch's division was assigned to protect Washington during Lee's advance into
Maryland. With the Union loss at
Second Bull Run, McClellan returned to command and ordered
William B. Franklin to secure Maryland Heights (across the Potomac from Harper's Ferry). Franklin left Couch to control the Heights (and hence the town) and rejoined the Army of the Potomac at
Antietam.