References:
Dyer's Compendium of the War of the Rebellion, 1908 Edition

RIGBY'S BATTERY "A" LIGHT ARTILLERY

Organized at Baltimore, Md., with Purnell Legion August and September, 1861. Attached to Dix's Command, Baltimore, Md., to May, 1862. 4th Brigade, Artillery Reserve, 5th Army Corps, Army of the Potomac, to September, 1862. Artillery, 1st Division, 6th Army Corps, to May, 1863. 4th Volunteer Brigade, Artillery Reserve, Army of the Potomac, to July, 1863. 3rd Volunteer Brigade, Artillery Reserve, Army of the Potomac, to October, 1863. Artillery Brigade, 1st Army Corps, Army of the Potomac, to March, 1864. Camp Barry, Defences of Washington, 22nd Army Corps, to May, 1864. 1st Brigade, DeRussy's Division, 22nd Army Corps, to July, 1864. Reserve Division, Harper's Ferry, W. Va., to January, 1865. 3rd Brigade, 3rd Division, West Virginia, to March, 1865.

SERVICE.--Duty at Baltimore, Md., and on eastern shore of Maryland till May, 1862. Joined Army of the Potomac on the Virginia Peninsula. Peninsula Campaign June to August. Seven days before Richmond June 25-July 1. Battles of Mechanicsville June 26. Savage Station June 29. White Oak Swamp June 30. Malvern Hill July 1. At Harrison's Landing till August 15. Movement to Fortress Monroe and Alexandria August 15-22. Maryland Campaign September 6-22. Battles of Crampton's Pass, South Mountain, Md., September 14. Antietam September 16-17. At Downsville, Md., till October 29. Movement to Falmouth, Va., October 29-November 19. Battle of Fredericksburg, Va., December 12-15. "Mud March" January 20-24, 1863. At White Oak Church till April 27. Chancellorsville Campaign April 27-May 6. Operations at Franklin's Crossing April 29-May 2. Battle of Maryes Heights, Fredericksburg, May 3. Salem Heights May 3-4. Banks' Ford May 4. Gettysburg (Pa.) Campaign June II-July 24. Battle of Gettysburg July 1-3. Duty on line of the Rappahannock and Rapidan till October. Bristoe Campaign October 9-22. Advance to line of the Rappahannock November 7-8, Mine Run Campaign November 26-December 2. Demonstration on the Rapidan February 6-7, 1864. Morton's Ford February 6-7. At Camp Barry and in the Defences of Washington March to July, 1864. Dismounted and ordered to Harper's Ferry, W. Va., July 3 as Infantry. Duty in District of Harper's Ferry, W. Va., till March, 1865. Consolidated with Battery "B," Maryland Light Artillery, March 11, 1865. Battery lost during service 6 Enlisted men killed and mortally wounded and 28 Enlisted men by disease. Total 34.

BATTERY “A” JUNIOR LIGHT ARTILLERY

Organized at Baltimore, Md., for 6 months' service July 14, 1863. Duty in the Defences of Baltimore and attached to Artillery Reserve, 8th Army Corps, to January, 1864. Mustered out January 19, 1864.

SNOW'S BATTERY "B" LIGHT ARTILLERY

Organized at Baltimore, Md., with the Purnell Legion September and October, 1861. Attached to Dix's Command, Baltimore, Md., Middle Department, to May, 1862. 4th Brigade, Artillery Reserve, 5th Army Corps, Army of the Potomac, to September, 1862. Artillery, 2nd Division, 6th Army Corps, Army of the Potomac, to May, 1863. Unattached, Artillery Reserve, Army of the Potomac, to June, 1863. Camp Barry, Washington, D.C., 22nd Army Corps, to August, 1863. 2nd Brigade, Maryland Heights Division, West Virginia, to December, 1863. 2nd Brigade, 1st Division West Virginia, to April, 1864. Artillery, 1st Division West Virginia, to May, 1864. Artillery Brigade, West Virginia, to July, 1864. Reserve Division, Harper's Ferry, W. Va., to April, 1865. 2nd Brigade, 1st Division, West Virginia, to July, 1865.

SERVICE.--Duty at Baltimore, Md., and in the eastern shore of Maryland till May, 1862. Joined Army of the Potomac on Virginia Peninsula. Peninsula Campaign May to August, 1862. New Bridge June 5. Seven days before Richmond June 25-July 1. Battles of Mechanicsville June 26; Savage Station June 29; White Oak Swamp June 30; Malvern Hill July 1. At Harrison's Landing till August 15. Movement to Fortress Monroe, thence to Alexandria August 15-22. Maryland Campaign September 6-22. Battles of Crampton's Pass, Md., September 14; Antietam September 16-17. At Hagerstown, Md., till October 29. Movement to Falmouth, Va., October 29-November 19. Battle of Fredericksburg, Va., December 12-15. "Mud March" January 20-24, 1863. Chancellorsville Campaign April 27-May 6. With Provost Guard, Army of the Potomac. Ordered to Washington, D.C., June 25, and duty at Camp Barry till July 5. Ordered to Frederick, Md., with Briggs' occupation of Harper's Ferry, W. Va., July 8. Duty in District of Harper's Ferry till April, 1864. Moved to Martinsburg April 17. Sigel's Expedition from Martinsburg to New Market April 30-May 16. Battle of New Market May 15. Hunter's Raid to Lynchburg May 24-July 1. Advance to Staunton May 24-June 6. Piedmont June 5. Occupation of Staunton June 6. Near Lynchburg June 14. Diamond Hill June 17. Lynchburg June 17-18. Liberty June 19. Buford's Gap June 20. Catawba Mountains and about Salem June 21. Duty in District of Harper's Ferry till July, 1865. One section in operations in the Shenandoah Valley July 27 to August 8, 1864. At Cumberland, Md., and in action at Falck's Mills, near Cumberland, August 1, 1864.

Battery lost during service 5 Enlisted men killed and mortally wounded and 27 Enlisted men by disease. Total 32.

BATTERY "B" JUNIOR LIGHT ARTILLERY.

Organized at Baltimore, Md., July 14, 1863, for 6 months' service. Duty in the Defences of Baltimore. Attached to Artillery Reserve, 8th Army Corps, to January, 1864. Mustered out January 16, 1864.

BATTERY "D" LIGHT ARTILLERY.

Organized at Baltimore, Md., February 29, 1864. Attached to 3rd Separate Brigade, 8th Army Corps, Middle Department, to June, 1864. 3rd Brigade, DeRussy's Division, 22nd Army Corps, Defences of Washington, D.C., 4th Brigade, DeRussy's Division, 22nd Army Corps, to October, 1864. 3rd Brigade, ReRussy's Division, 22nd Army Corps, to February, 1865. 1st Brigade, DeRussy's Division, 22nd Army Corps, to June, 1865,

SERVICE.--Duty in the Defences of Baltimore, Md., till June, 1864, and in the Defences of Washington south of the Potomac. Stationed at Forts Tillinghast, Lyon, Willard, Richardson, Ward, Barnard, C. F. Smith and Whipple till June, 1865. Mustered out June 24, 1865.

BALTIMORE INDEPENDENT BATTERY LIGHT ARTILLERY.

Organized at Baltimore, Md., and mustered in August 18, 1862. Ordered to Monocacy, Md., September 18, 1862. Attached to Kenly's Maryland Brigade, Defences Upper Potomac, Middle Department, to March, 1863. 3rd Brigade, 2nd Division, 8th Army Corps, Middle Department, to June, 1863. French's Division, 8th Army Corps, to July, 1863. Defences of Baltimore, 8th Army Corps, to October, 1863. 3rd Separate Brigade, 8th Army Corps, to December, 1863. Artillery Reserve, 8th Army Corps, to July, 1864. Reserve Division, District of Harper's Ferry, W. Va., to January, 1865. Camp Barry, Washington, D.C., 22nd Army Corps, to June, 1865.

SERVICE.--Defence of Williamsport, Md., September 20-21. 1862. Duty at Williamsport till December. Moved to Maryland Heights December 11-12, and duty there till March, 1863. Moved to Berryville, Va., March 28, 1863. and duty there till June. Action at Berryville June 13. Opequan Creek June 13. Retreat to Winchester June 13. Battle of Winchester June 14-15. Battery mostly captured. Reorganizing battery and duty in the Defences of Baltimore, Md., till June, 1864. Operations against Early's Invasion June and July. Middletown, Solomon's Gap and Catoctin Mountains July 7. Frederick, Md., July 7-8. Battle of Monocacy July 9. Pursuit of Early till July 30. Duty in the Defences of Harper's Ferry, W. Va., till January, 1865, and at Camp Barry, Defences of Washington, D.C., till June. Mustered out June 17, 1865.

Battery lost during service 1 Enlisted man killed and 7 Enlisted men by disease. Total 8.

1st REGIMENT HEAVY ARTILLERY.

Organization not completed. Company "A" on duty In the Defences of Baltimore, Md.