From 1850 until 1853, he was attached to Forts Sullivan and Preble in Maine, primarily serving on garrison duty. Promotion came relatively slowly in the antebellum army, and officers often resigned to take up civilian pursuits. Duncan Johnson was no exception.
Between 1850 and 1853, Duncan Johnson served at Forts Sullivan and Preble in Maine, primarily on garrison duty. In the antebellum army, promotions were often delayed, leading many officers to resign for civilian work. Duncan Johnson was no exception.