K stands for killed; w for wounded; m w for mortally wounded; m for captured or missing; c for captured.
The Union forces. Army of the Potomac, Major-General George B. McClellan.
General headquarters: Provost Marshal's and Hdq'rs Guard, Brig.-Gen. Andrew Porter: 2d U. S. Cavalry (7 co's), and McClellan (Ill.) Dragoons (2 co's), Maj. Alfred Pleasonton; 93d N. Y. (4 co's), and Sturges (Ill.) Rifles, Maj. Granville O. Haller; 8th U. S. Inf. (2 co's), Capt. Royal T. Frank and Lieut. Eugene Carter. Escort: 4th U. 8.
Cav. (2 co's), and Oneida (N. Y.) Cavalry, Capt. James B. McIntyre. Volunteer Engineer Brigade, Brig.-Gen. Daniel P. Woodbury: 15th N. Y., Col. J. McLeod Murphy; 50th N. Y., Col. Charles B. Stuart.
Brigade loss: m, 12. Battalion U. S. Engineers, Capt. James C. Duane.
Loss: w, 2; m, 9==11. Casey's Command (at White House), Brig.-Gen. Silas Casey: 4th Pa. Cav. (squadron), Capt. William Shorts; 11th Pa. Cav. (5 co's), Col. Josiah Harlan; F, 1st N. Y. Arty., Capt. Wm