The Miller Farm is a historic farm located on the Antietam National Battlefield near Sharpsburg, Maryland. Christopher Cruss established the farm in the 1780s, and he sold it to John Myers in 1800; in 1844, John Miller purchased the farm on Myers' death. The Hagerstown Turnpike was completed in 1810, cutting through the farm, and leading huge numbers of Union and Confederate troops to the Miller Farm during the 1862 Maryland campaign. During the Battle of Antietam, some of the worst fighting occurred in Miller's Cornfield, and the home and barn survived the fight, while the blacksmith shop was destroyed and the corn crops decimated by hails of bullets. The Miller Farm was briefly used as a Union Army hospital, and its harvest was used to feed the wounded Union troops. In 1885, the Millers sold the farm to the Hoffmans, who owned it until 1933. In 1989, the farm was sold to the Conservation Fund, which sold it to the National Park Service a year later.