Department of Virginia December 1861 United States Army < to November • December 1861 • to January > Commanded by Major General John Wool Fortress Monroe & Camp Hamilton 1st Delaware Infantry Regiment Colonel John W. Andrews 20th Indiana Infantry Regiment Colonel William L. Brown 16th Massachusetts Infantry Regiment Colonel Powell T. Wyman 10th New York Infantry Regiment Lt. Colonel Alexander Elder 1st New York Mounted Rifles Major Charles C. Dodge 20th New York Infantry Regiment Colonel Max Weber 99th New York Infantry Regiment Colonel David W. Wardop 11th Pennsylvania Cavalry Regiment Colonel Joseph Harlan from Pennsylvania 4th United States Artillery, Battery D 4th United States Artillery, Battery L Newport News Brigadier General Joseph K.F. Mansifeld 1st Massachusetts Infantry Battalion expanded to 29th Massachusetts Regt. (below) 7th Massachusetts Independent Battery 29th Massachusetts Infantry Regiment Colonel Ebenezer Pierce Organized at Newport News 1st New York Infantry Regiment Colonel Garrett W. Dyckman 2nd New York Infantry Regiment Colonel Joseph B. Carr 7th New York Infantry Regiment Colonel Edward Kapff 11th New York Infantry Regiment Colonel Charles M. Leoser from New York