Details the Monocacy National Battlefield in Frederick, Maryland, provided by the National Park Service. The site commemorates the battle of Monocacy of the U.S. Civil War. Discusses the facilities, programs, and activities.

The story of the fighting at Monocacy, known as the "Battle that Saved Washington." A pivotal day and an even more pivotal campaign that went right to the gates of Washington, D.C.

Early lost a crucial day in the heat and drought of mid-summer, a delay that perhaps cost the Confederacy a chance to change the course of history.

Discusses how to plan a staff ride of a battlefield, such as a Civil War battlefield, as part of military training. This brochure demonstrates how a staff ride can be made available to military leaders throughout the Army, not just those in the formal education system.

September 17, 1862--one of the most consequential days in the history of the United States--was a moment in time when the future of the country could have veered in two starkly different directions.Confederates under General Robert E. Lee had embarked upon an invasion of Maryland, threatening to achieve a victory on Union soil that could potentially end the Civil War in Southern Independence. Lee's opponent, Major General George McClellan, led the Army of the Potomac to stop Lee's campaign. In Washington D.C., President Lincoln eagerly awaited news from the field, knowing that the future of freedom for millions was at stake. Lincoln had resolved that, should Union forces win in Maryland, he would issue his Preliminary Emancipation Proclamation.All this hung in the balance on September 17: the day of the battle of Antietam.The fighting near Sharpsburg, Maryland, that day would change the course of American history, but in the process, it became the costliest day this nation has ever known, with more than 23,000 men falling as casualties.Join historian Daniel J. Vermilya to learn more about America's bloodiest day, and how it changed the United States forever in That Field of Blood.