A historical marker in front of this building reads in part:
"On November 5, 1862, several weeks after a tainted victory at Antietam, the Army of the Potomac's Commander-in-Chief Gen. Brinton McClellan established his headquarters here. That same day President Abraham Lincoln wrote the orders relieving McClellan of command. On the snowy evening of November 7 Gen. C.P. Buckingham arrived at McClellan's tent with Gen. Ambrose Burnside. Buckingham handed McClellan the dispatch. When he finished reading, McClellan declared, "General Burnside, you are now in command of the Army." After bidding farewell to his troops in nearby Warrenton on Nov. 10. Gen McClellan returned to civilian life. In 1864 he ran against Lincoln as the Democratic Party candidate for president."