The Monocacy National Battlefield commemorates a Civil War battle fought 9 July, 1864, between the troops of Confederate Lieutenant General Jubal Early and Union General Lew Wallace. The Battle of Monocacy, or "The Battle that Saved D.C.," prevented Early from completing his campaign to relieve pressure from General Robert E. Lee and to capture Washington, D.C. Although the Confederates won the battle, the time lost permitted the Union to send reinforcements to the capital. The battle aside, Native Americans have been present in the area since the earliest human occupation of North America, nearly 10,000 years ago; and European explorers and traders arrived in the region in the early 1700s.
The park offers a self-guided six mile auto tour, a number of self-guided interpretive walking trails, exhibits, an introductory audio-visual presentation, guided tours, in-classroom speakers, and traveling trunks.