Army eventually achieving the rank of brevet Brigadier General after serving in the American Civil War having also served in the War of 1812, the Second Seminole War and the Mexican–American War.
After Gardner retired from military service he devoted time to recruiting for the Army.
Author: Mathew Brady photo taken before 1860; Daguerreotype collection (Library of Congress) Image cropping, touch up and rendering by Gwillhickers Source: