Stationed at Fort Vancouver, Washington Territory, January 1, 1861. Moved to Fort Point, CA, February 28-March 5. Carlton's Expedition from Southern California through Arizona to New Mexico April 13-September 20, 1862. Duty at various posts in New Mexico until 1865, then ordered to Boston, MA.

Stationed at Fort Vancouver, Washington Territory, January 1, 1861. Moved to Fort Point, CA, February 28-March 5. Stationed at Fort Point during the entire war.

Stationed at Fort Vancouver, Washington Territory, January 1, 1861. At San Francisco, CA, until October 1861. Ordered to New York, October 14, 1861; thence moved to Washington, DC. Attached to Artillery Reserve, Army of the Potomac, to May 1862. (Attached to Battery G, 3^rd U.S. Field Artillery, May to October 1862.) 1st Brigade, Horse Artillery, Artillery Reserve, 5th Army Corps, Army of the Potomac, to September 1862. Artillery, Cavalry Division, Army of the Potomac, to November 1862. (Battery G broken up October 1862.) Bayard's Cavalry Brigade, Army of the Potomac, to February 1863. Artillery Reserve, Army of the Potomac, to May 1863. 2nd Regular Brigade, Artillery Reserve, Army of the Potomac, to June 1863. 2nd Brigade, Horse Artillery, Army of the Potomac, to August 1864. (Consolidated with Battery F, 3^rd U.S. Field Artillery and Battery K, 3^rd U.S. Field Artillery from March 1864.) Horse Artillery, Army of the Shenandoah, Middle Military Division, to December 1864. Horse Artillery, Reserve, Army of the Shenandoah, to April 1865. Horse Artillery Brigade, 22nd Army Corps, to August 1865.

SERVICE.--Duty in the Defenses of Washington, D. C., until March, 1862. Moved to the Virginia Peninsula. Siege of Yorktown April 5-May 4. Seven days before Richmond June 25-July 1. Operations about White House June 26-July 2. Rejoined army via Gloucester Point. Malvern Hill August 5. Maryland Campaign September 6-22. Middletown, Md., September 13. Battle of Antietam, Md., September 16-17. Shepherdstown Ford September 19. Aldie October 31. Mountsville October 31. New Baltimore, Salem and Thoroughfare Gap November 4. Rappahannock Station November 7-9. Battle of Fredericksburg, Va., December 12-15. Chancellorsville Campaign April 27-May 6. Battle of Chancellorsville May 1-5. Aldie June 17. Middleburg June 19. Upperville June 22. Battle of Gettysburg, Pa., July 1-3. Smithburg, Md., July 5. Jones' Cross Roads, near Williamsport, July 10-13. Robertson's Ford September 23. Bristoe Campaign October 9-22. Advance to line of the Rappahannock November 7-8. Rappahannock Bridge November 7-8. Mine Run Campaign November 26-December 2. Kilpatrick's Raid on Richmond February 28-March 4, 1864. Fortifications of Richmond March 1. Rapidan Campaign May 4-June 12. Wilderness May 5-7. Spotsylvania Court House May 8-21. Salem Church May 27. Cold Harbor June 1-12. Siege of Petersburg June 16 to August 5. Deep Bottom July 27-28. Sheridan's Shenandoah Campaign August 7-November 28. Near Winchester August 11. Near Kearneysville August 25. Battle of Cedar Creek October 19. Duty in the Shenandoah Valley until April, 1865. In Defenses of Washington until August, 1865.

Stationed at Fort Vancouver, Washington Territory, January 1, 1861. Stationed at San Francisco, CA during entire war.

Stationed at Fort Ridgely, MN, January 1, 1861.  Moved to Elkton, MD, April 14-24.  Moved to Washington, DC, May 1861. Attached to Sherman's Brigade, Tyler's Division, McDowell's Army, Northeast Virginia, to August 1861. Sherman's Brigade, Division of the Potomac, to October 1861. Porter's Division, Army of the Potomac, to October 1861. William T. Sherman's South Carolina Expeditionary Corps to April 1862. 2nd Brigade, 1st Division, Department of the South, to July 1862. District of Hilton Head, SC, Department of the South, to September 1862. United States Forces, Hilton Head, SC, 10th Army Corps, Department of the South, to June 1863. United States Forces, Folly Island, SC, 10th Army Corps, to July 1863. United States Forces, Morris Island, SC, 10th Army Corps, to January 1864. Artillery, Folly Island, SC, Northern District, 10th Army Corps, to February 1864. Artillery, Ames' Division, District of Florida, Department of the South, to April 1864. Artillery, 3rd Division, 10th Army Corps, Army of the James, to May 1864. Artillery, 1st Division, 10th Army Corps, to June 1864. Artillery, 2nd Division, 10th Army Corps, to August 1864. Artillery Brigade, 10th Army Corps, to December 1864. Artillery Brigade, 25th Army Corps, to January 1865. Artillery, 3rd Division, Terry's Provisional Corps, Department of North Carolina, to March 1865. Artillery, 3rd Division, 10th Army Corps, Department of North Carolina.

SERVICE.--Occupation of Arlington Heights, Va., May 24, 1861. Advance on Manassas, Va., July 16-21. Blackburn's Ford July 18. Battle of Bull Run July 21. Expedition to Port Royal, S. C., October 21-November 7. Bombardment and capture of Forts Walker and Beauregard, Port Royal Harbor, November 7. Duty at Hilton Head, S.C., until February, 1862. Expedition to Florida February 25-March 5. At Hilton Head, S, C., until May. Operations on James Island, S.C., June 1-28. Action on James Island June 10. Battle of Secessionville June 16. At Hilton Head, S.C., until October. Expedition to Pocotaligo, S. C., October 21-23. Action at Pocotaligo October 22. At Hilton Head, S.C., until June, 1863. Moved to Folly Island, S.C. Attack on Morris Island, S.C., July 10. Operations on Morris Island against Forts Wagner and Gregg and against Fort Sumter and Charleston July 10-September 7. Assault on Fort Wagner July 18. Capture of Forts Wagner and Gregg September 7. Operations on Morris and Folly Islands against Charleston until January, 1864. Expedition to Florida February 5-7. Expedition from Jacksonville to Lake City, Fla., February 8-22. Battle of Olustee February 20. Duty at Jacksonville until April. Moved to Gloucester Point, Va. Butler's operations on south side of the James River and against Petersburg and Richmond May 5-28. Siege operations against Petersburg and Richmond June 16 to December 7. Battle of Chaffin's Farm, New Market Heights, September 28-30. Darbytown Road October 7. Expedition to Fort Fisher, N. C., December 7-27. Second Expedition to Fort Fisher, N. C., January 3-15, 1865. Assault and capture of Fort Fisher January 15. Near Sugar Loaf Battery February 11. Occupation of Wilmington February 22. Northeast Ferry February 22. Campaign of the Carolinas March 1-April 26. Advance on Goldsboro March 6-21. Advance on Raleigh April 10-13. Bennett's House April 26. Surrender of Johnston and his army. Duty in Dept. of North Carolina until ?.

Stationed at Fortress Monroe, VA, January 1, 1861. Attached to Battery K, 3^rd U.S. Field Artillery, Artillery Reserve, Army of the Potomac, October 1861, to May 1862. 5th Brigade, Artillery Reserve, 5th Army Corps, Army of the Potomac, to September 1862. Artillery, 1st Division, 3rd Army Corps, Army of the Potomac, to May 1863. 1st Regular Brigade, Artillery Reserve, Army of the Potomac, to November 1863. Artillery Brigade, 5th Army Corps, Army of the Potomac,. to March 1864. (Consolidated with Battery C, 3^rd U.S. Light Artillery, February 1864.) Artillery Reserve, Army of the Potomac, to April 1864. 1st Brigade, Horse Artillery, Army of the Potomac, to August 1864. Horse Artillery, Army of the Shenandoah, Middle Military Division, to December 1864. Reserve Horse Artillery, Army of the Shenandoah, to April 1865. Horse Artillery Brigade, 22nd Army Corps, to August 1865.

SERVICE.--Duty in the Defenses of Washington, D. C., until March, 1862. Ordered to the Virginia Peninsula. Siege of Yorktown, Va., April 5-May 4. Seven days before Richmond June 25-July 1. Malvern Hill July 1. At Harrison's Landing until August 16. Moved to Alexandria August 16-23. Duty in the Defenses of Washington until November. Movement to Falmouth, Va. Battle of Fredericksburg, Va., December 12-15. At Falmouth until April, 1863. Chancellorsville Campaign April 27-May 6. Battle of Chancellorsville May 1-5. Battle of Gettysburg, Pa., July 1-3. Bristoe Campaign October 9-22. Advance to line of the Rappahannock November 7-8. Rappahannock Station November 7. Mine Run Campaign November 26-December 2. Rapidan Campaign May 4-June 12, 1864. Wilderness May 5-7. Spotsylvania May 8-21. Cold Harbor June 1-12. Siege of Petersburg June 16 to August 5. Deep Bottom July 27-28. Sheridan's Shenandoah Valley Campaign August 7-November 28. Near Winchester August 11. Near Kearneysville August 25. Battle of Cedar Creek October 19. Duty in the Shenandoah Valley until April, 1865, and in the Defenses of Washington until August, 1865.

Stationed at Fort Vancouver, Washington Territory, January 1, 1861. At San Francisco, CA, until October 1861. Ordered to New York October 14, thence moved to Washington, DC. Attached to Artillery Reserve, Army of the Potomac (attached to Battery C, 3^rd U.S. Light Artillery), March to May 1862. 1st Brigade, Horse Artillery, Artillery Reserve, 5th Army Corps, Army of the Potomac, to September 1862. Cavalry Division, Army of the Potomac, to October 1862. Ordered to Virginia Peninsula, March 1862. Siege of Yorktown, April 5-May 4. Near Williamsburg, May 4. Seven days before Richmond, June 25-July 1. At White House rejoin army via Gloucester Point. Malvern Hill, August 5. Maryland Campaign, September 6-22. Middletown, MD, September 13. Battle of Antietam, September 16-17. Shepherdstown Ford, September 19. Broken up October, 1862.

Reorganized April, 1864. Attached to Artillery Reserve, 9th Army Corps, Army of the Potomac, to May, 1864. 3rd Brigade, Hardin's Division, 22nd Army Corps, to July, 1864. 1st Brigade, Hardin's Division, 22nd Army Corps, to December, 1864. Fort Foote, Defenses of Washington north of the Potomac, 22nd Army Corps, to April, 1865. 2nd Brigade, Hardin's Division, 22nd Corps, to August, 1865.

SERVICE.--Rapidan Campaign May 4-14, 1864. Battles of the Wilderness May 5-7; Spotsylvania Court House May 8-14. Ordered to Washington May 14, and duty in the Defenses of that city north of the Potomac until August, 1865.

Stationed at Alcatraz Island, CA, January 1, 1861. Battery on duty at San Francisco, CA during entire war.

Stationed at Presidio of San Fransico, CA, January 1, 1861. Battery on duty at San Francisco, CA, until July 1864, and in the Department of the East until ?.

Stationed at Fortress Monroe, VA, January 1, 1861. (Attached to Battery F, 3^rd U.S. Field Artillery.) Artillery Reserve, Army of the Potomac, October 1861 to May 1862. 5th Brigade, Artillery Reserve, 5th Army Corps, Army of the Potomac, to September 1862. Artillery, 1st Division, 3rd Army Corps, Army of the Potomac, to May 1863. 1st Regular Brigade, Artillery Reserve, Army of the Potomac, to November 1863. Artillery Brigade, 5th Army Corps, Army of the Potomac, to February 1864. (Consolidated with Battery C, 3^rd U.S. Light Artillery, February 1864.) 2nd Brigade, Horse Artillery, Army of the Potomac, to August 1864. Horse Artillery, Army of the Shenandoah, Middle Military Division, to December 1864. Horse Artillery Reserve, Army of the Shenandoah, to April 1865. Horse Artillery Brigade, 22nd Army Corps, to August 1865.

SERVICE.--Duty in the Defenses of Washington, D.C., until March, 1862. Ordered to the Virginia Peninsula March, 1862. Siege of Yorktown April 5-May 4. Seven days before Richmond June 25-July 1. Malvern Hill July 1. At Harrison's Landing until August 16. Moved to Fortress Monroe, thence to Alexandria August 16-23. Duty in the Defenses of Washington until November. Ashby's Gap September 22. Movement to Falmouth, Va. Battle of Fredericksburg, Va., December 12-15. At Falmouth until April, 1863. Chancellorsville Campaign April 27-May 6. Battle of Chancellorsville May 1-5. Battle of Gettysburg, Pa., July 1-3. Bristoe Campaign October 9-22. Advance to line of the Rappahannock November 7-8. Rappahannock Station November 7. Mine Run Campaign November 26-December 2. Rapidan Campaign May 4-June 12. Wilderness May 5-7. Spotsylvania Court House May 8-21. Cold Harbor June 1-12. Siege of Petersburg June 16 to August 5. Sheridan's Shenandoah Valley Campaign August 7-November 28. Near Winchester August 11. Near Kearneysville August 25. Battle of Cedar Creek October 19. Duty in the Shenandoah Valley until April, 1865, and in the Defenses of Washington, D.C., until August, 1865.

Stationed at Fort Umpqua, Washingotn Territory, January 1, 1861. At San Francisco, CA until October 1861. Ordered to New York, October 14, thence to Washington, DC. Attached to Artillery Reserve, Army of the Potomac, March to May 1862. Artillery, 2nd Division, 5th Army Corps, Army of the Potomac, to December 1862. Artillery, 1st Division, 9th Army Corps, Army of the Potomac, to April 1863, and Department of the Ohio to June 1863. Artillery Reserve, 9th Army Corps, Army of the Tennessee, to August 1863. Artillery, 1st Division, 9th Army Corps, to October 1863. Artillery, 2nd Division, 9th Army Corps, to January 1864. Artillery, 1st Division, 9th Army Corps, to April 1864. Reserve Artillery, 9th Army Corps, Army of the Potomac, to June 1864. Camp Barry, Defenses of Washington, DC, 22nd Army Corps, to February 1865. District of Alexandria, VA, 22nd Army Corps, to August 1865.

SERVICE.--Siege of Yorktown, Va., April 5-May 4, 1862. New Bridge June 19. Seven days before Richmond June 25-July 1. Mechanicsville June 26. Gaines' Mill June 27. Turkey Bridge June 30. Malvern Hill July 1. At Harrison's Landing until August 16. Moved to Fortress Monroe, thence to Alexandria, Va., August 16-23. Maryland Campaign September 6-22. Battle of Antietam September 16-17. At Sharpsburg until October 30. Movement to Falmouth, Va., October 30-November 19. Battle of Fredericksburg, Va., December 12-15. "Mud March" January 20-24, 1863. Moved to Newport News, Va., February 7; thence to Kentucky March 21-28. Duty in District of Central Kentucky until June. Moved to Vicksburg, Miss., June 4-14. Siege of Vicksburg, Miss., June 14-July 4. Advance on Jackson, Miss., July 4-10. Siege of Jackson July 10-17. Moved to Covington, thence to Crab Orchard, Ky., August 4-18. Moved to Knoxville, Tenn., September 10-26. Action at Philadelphia October 16. Knoxville Campaign November 4-December 23. Action at Campbell's Station November 16. Siege of Knoxville November 17-December 5. Blain's Cross Roads December 17. Strawberry Plains January 21-22, 1864. Duty in East Tennessee until March, 1864. Ordered to Annapolis, Md. Rapidan Campaign May 4-16. Wilderness May 5-7. Spotsylvania Court House May 8-16. Ordered to Washington, D.C., May 16, and duty in the Defenses of that city and Alexandria until August, 1865.

Stationed at Fort Vancouver, Washington Territory, January 1, 1861. At San Francisco, CA, until October 1861. Ordered to New York, October 14, thence to Washington, DC. Attached to Battery L, 3^rd U.S. Field Artillery, Artillery Reserve, Army of the Potomac, March to May 1862. Artillery, 2nd Division, 5th Army Corps, Army of the Potomac, to December 1862. Artillery, 1st Division, 9th Army Corps, Army of the Potomac, to April 1863, and Department of the Ohio to June 1863. Artillery Reserve, 9th Army Corps, Army of the Tennessee, to August 1863. Artillery, 1st Division, 9th Army Corps, Deprtment of the Ohio, to October 1863. Artillery, 2nd Division, 9th Army Corps, to January 1864. Artillery, 1st Division, 9th Army Corps, to April 1864. Reserve Artillery, 9th Army Corps, Army of the Potomac, to June 1864. Camp Barry, Defenses of Washington, DC, 22nd Army Corps, to February 1865. District of Alexandria, 22nd Army Corps, to August 1865.

SERVICE.--Siege of Yorktown, Va., April 5-May 4. New Bridge June 19. Seven days before Richmond June 25-July 1. Mechanicsville June 26. Gaines' Mill June 27. Turkey Bridge June 30. Malvern Hill July 1. At Harrison's Landing until August 16. Movement to Fortress Monroe, thence to Alexandria August 16-23. Maryland Campaign September 6-22. Battle of Antietam September 16-17. At Sharpsburg until October 30. Movement to Falmouth, Va., October 30-November 19. Battle of Fredericksburg, Va., December 12-15. "Mud March" January 20-24, 1863. Moved to Newport News February 7, thence to Kentucky March 21-28. Duty in District of Central Kentucky until June. Moved to Vicksburg, Miss., June 4-14. Siege of Vicksburg June 14-July 4. Advance on Jackson, Miss., July 4-10. Siege of Jackson July 10-17. Moved to Covington, thence to Crab Orchard, Ky., August 4-18. Moved to Knoxville, Tenn., September 10-26. Action at Philadelphia October 16. Knoxville Campaign November 4-December 23. Campbell's Station November 16. Siege of Knoxville November 17-December 5. Blain's Cross Roads December 17. Strawberry Plains January 21-22, 1864. Duty in East Tennessee until March. Moved to Annapolis, Md. Rapidan Campaign May 4-16. Battle of the Wilderness May 5-7. Spotsylvania Court House May 8-16. Ordered to Washington, D.C., May 16, and duty in the Defenses of that city and Alexandria, Va., until August, 1865.

The 3^rd U.S. Field Artillery Regiment lost during the war 2 Officers and 39 Enlisted men killed and mortally wounded and 3 Officers and 67 Enlisted men by disease. Total 111.