MapPlan of the Battle of Monocacy, Maryland, July 9th, 1864. The map shows the location of troops on either side of the Monocacy River and north into the city of Frederick, Md. This engagement, part of "Early's Washington Raid" took place on July 9, 1864. Early's troops met Federal forces near the river. The Union troops were routed and retreated to Baltimore.
- Contributor: Sneden, Robert Knox
- Date: 1864-07-09