Union Regimental Index Maryland 1st Regiment Cavalry 2nd Regiment Cavalry 1st Regiment Potomac Home Brigade (Cole's) 3rd Regiment Cavalry (Bradford Dragoons) Purnell Legion Cavalry Smith's Independent Cavalry Company Rigby's Battery "A" Light Artillery Battery "A" Junior Light Artillery Snow's Battery "B" Light Artillery Battery "B" Junior Light Artillery Battery "D" Light Artillery Baltimore Independent Battery Light Artillery 1st Regiment Heavy Artillery 1st Regiment Infantry 1st Regiment Potomac Home Brigade Infantry 1st Regiment Eastern Shore Regiment 2nd Regiment Infantry 2nd Regiment Potomac Home Brigade Infantry 2nd Regiment Eastern Shore Infantry 3rd Regiment Infantry 3rd Regiment Potomac Home Brigade Infantry 4th Regiment Infantry 4th Regiment Potomac Home Brigade Infantry 5th Regiment Infantry 6th Regiment Infantry 7th Regiment Infantry 8th Regiment Infantry 9th Regiment Infantry 10th Regiment Infantry 11th Regiment Infantry 12th Regiment Infantry 13th Regiment Infantry Purnell Legion Infantry Baltimore (or Dix) Light Guard Infantry Patapsco Guard