Sept. 16, 1862 - McClellan Headquarters at Keedysville / Pry Farm

Sept. 18, 1862

Keedysville, MD

"After the Battle of South Mountain ended around nightfall on September 14, 1862, many Confederates marched by here. The next day, Gen. George B. McClellan’s Army of the Potomac arrived, and McClellan established his headquarters here in the German Reformed Church. The army bivouacked in and around Keedysville before it attacked Gen. Robert E. Lee’s Army of Northern Virginia near Sharpsburg on September 17. After the battle, the bloodiest day in American history, Keedysville became one vast Union hospital. Here Capt. Oliver Wendell Homes, Jr., son of the poet and future justice of the U.S. Supreme Court, received treatment for his neck wound. Keedysville hosted Federal troops for several weeks thereafter."

I think this was the German Reformed Church.

Also: an historic bridge over the Antietam Creek

https://www.hmdb.org/m.asp?m=1640

"A knock on the door on September 16, 1862, forever changed the lives of Philip and Elizabeth Pry. For almost twenty years, the Prys prospered on this 140-acre farm along Antietam Creek while raising their family of six children. With Confederate forces gathering on the other side of the Antietam, Gen. George McClellan positioned the Union Army on this side and selected the Pry home to serve as his headquarters.

Thousands of soldiers and horses descended on this farm. Fences were knocked down, crops trampled, loads of hay confiscated, livestock taken to feed the army, and the house and barn converted into field hospitals.

After the battle, Phillip Pry filed numerous claims with the War Department for damages to his farm. Portions of the claims were paid, other charges were disputed and there was an investigation of overpayment. The financial burden proved too much. In 1874 the Prys sold their home and moved to Tennessee."

https://www.hmdb.org/m.asp?m=40445

"Gen. George McClellan used the Pry House as the headquarters for the Union Army of the Potomac. Officers brought some of the Pry furniture out on the lawn. There eyewitnesses described a “small redan built of fence rails” with telescopes mounted, and how the commander “stood in a soldierly attitude intently watching the battle.” Reporter Charles Coffin rode to “the large square mansion of Mr. Pry” where “the general was sitting in an arm chair.. his staff were about him, their horses saddled and bridled, were hitched to the trees and fences.” When President Lincoln visited in October, Gen. McClellan brought him to the Pry house to see the former headquarters site."