"Douglass' distinguished service in the Niagara Campaign of 1814, at the Battle of Lundy's Lane, and at the siege of Fort Erie earned him a promotion to first lieutenant and a brevet captaincy in September, 1814. Douglass' personal courage while in command of an artillery battery at Fort Erie was singled out for commendation, and credited with helping to ensure victory for the American forces during the British assault in August 1814. After demobilization, the army was reluctant to lose such a promising young officer to civilian life, and as a result, on January 1, 1815, Douglass was offered the opportunity to become assistant professor of natural philosophy at the Military Academy, the only school at the time to offer formal training in engineering and therefore an outstanding opportunity for an aspiring young scientist."
The Historical magazine: and notes and queries concerning the antiquities ... has "Reminiscences of the Campaign of 1814", from the papers of the late David B. Douglass.
Mr. Douglass married Anna, daughter of surveyor Andrew Ellicott.