1st REGIMENT HEAVY ARTILLERY.

Organized at Washington, D.C., from 4th Conn. Infantry, January 2, 1862. Attached to Military District of Washington to April, 1862. Siege artillery, Army Potomac, to May, 1862. 3rd Brigade, 2nd Division, 5th Army Corps, Army Potomac, to July, 1862. Siege artillery, Army Potomac, to August, 1862. Artillery defences Alexandria Military District of Washington, to February, 1863. Artillery defences of Alexandria, 22nd Army Corps, to April, 1863. 2nd Brigade, DeRussy's Division, defences south of the Potomac, 22nd Army Corps, to May, 1863. 3rd Brigade, DeRussy's Division, 22nd Corps, to December, 1863. 2nd Brigade, DeRussy's Division, 22nd Army Corps, to March, 1864. 4th Brigade, DeRussy's Division, 22nd Army Corps, to May, 1864. (Cos. "B" and "M" attached to Artillery Reserve, Army Potomac, October, 1862, to January, 1864.) Point of Rocks, Va., Dept., of Virginia and North Carolina to June, 1864. Siege artillery, Dept. of Virginia and North Carolina in the field, and siege artillery, Army Potomac, to May, 1865. Siege artillery, Dept. of Virginia, to July, 1865. 4th Brigade, DeRussy's Division, 22nd Army Corps, Dept. of Washington, to August, 1865. 3rd Brigade, Dept. of Washington, to September, 1865.

SERVICE.--Duty at Fort Richardson, defences of Washington, D.C., till April, 1862. Ordered to the Peninsula, Va., in charge of siege train Army Potomac, April 2. Siege of Yorktown April 12-May 4. Battle of Hanover C. H. May 27. Operations about Hanover C. H. May 27-29. Seven days before Richmond June 25-July 1. Gaines' Mill June 27. Malvern Hill July 1. At Harrison's Landing till August 15. Moved to Alexandria, Va., August 16-27. Duty in the defences of Washington, D.C., till May, 1864, as garrison at Fort Richardson. Cos. "B" and "M" detached with Army Potomac, participating in battle of Fredericksburg, Va., Dec. 12-15. Chancellorsville Campaign April 27-May 6. Battle of Chancellorsville May 1-5. Stafford Heights June 12. Battle of Gettysburg, Pa., July 1-3. Bristoe Campaign October 9-22. Advance to line of the Rappahannock November 7-8. Brandy Station November 8. Mine Run Campaign November 26-December 2. Rejoined regiment in defences of Washington January, 1864. Regiment ordered to Bermuda Hundred, Va., May 13, 1864. Engaged in fatigue duty and as garrison for batteries and forts on the Bermuda front and lines before Petersburg during siege operations against Petersburg and Richmond, May, 1864, to April, 1865. Occupy Fort Converse, Redoubt Dutton, Batteries Spofford, Anderson, Pruyn and Perry on the Bermuda front, and Forts Rice, Morton, Sedgwick and McGilvrey, and Batteries 1, 2, 3, 4, 5, 9, 10, 11, 12, 14, 15, 17, 18, 20, Burpee, Drake and Sawyer, on the Petersburg front, and at Dutch Gap, north of the James River. Assaults on Fort Dutton June 2 and 21, 1864 (Co. "L"). Attacks on the lines May 18, 19, 20, 21, 25, 27, 30, 31, June 1, 2, 5, 9, 18, 20 and 23. Mine explosion July 30, August 25, November 17, 18 and 28, 1864. Repulse of rebel fleet at Fort Brady on James River January 23-24, 1865. Expedition to Fort Fisher, N. C., January 3-15, 1865 (Cos. "B," "G," "L"). Capture of Fort Fisher January 15 (Cos. "B," "G," "L"). Assaults on and fall of Petersburg, Va., April 2, 1865. Duty in the Dept. of Va. till July 11. Moved to Washington, D.C., and duty in the defences of that city till September. Mustered out September 25, 1865.

Regiment lost during service 2 Officers and 49 Enlisted men killed and mortally wounded and 4 Officers and 172 Enlisted men by disease. Total 227.

2nd REGIMENT HEAVY ARTILLERY.

Organized at Washington, D.C., from 19th Conn. Infantry, November 23, 1863. Attached to 2nd Brigade, DeRussy's Division, 22nd Army Corps, Dept. of Washington, to February, 1864. 4th Brigade, DeRussy's Division, 22nd Army Corps, to May, 1864. 2nd Brigade, 1st Division, 6th Army Corps, Army Potomac, and Army Shenandoah, Middle Military Division, to June, 1865. 2nd Brigade, DeRussy's Division, 22nd Army Corps, Dept. of Washington, to August, 1865.

SERVICE.--Garrison duty at Forts Worth, Williams and Ellsworth, defences of Washington, D.C. South of the Potomac till May, 1864. Ordered to join Army of the Potomac in the field May 17. Moved to Spottsylvania C. H. May 17-19. Spottsylvania C. H. May 19-21. North Anna River May 23-26. On line of the Pamunkey May 26-28. Totopotomoy May 28-31. Hanover C. H. May 29. Cold Harbor May 31-June 12. Before Petersburg June 18-July 10. Jerusalem Plank Road June 22-23. Moved to Washington, D.C., July 10-12. Repulse of Early's attack on Washington July 12. Sheridan's Shenandoah Valley Campaign August to December. Battle of Opequan, Winchester, September 19. Fisher's Hill September 22. New Market September 23-24. Woodstock September 25. Battle of Cedar Creek October 19. Duty at Winchester and in the valley till December. Moved to Petersburg, Va., December 1-5. Siege of Petersburg December 5, 1864, to April 2, 1865. Dabney's Mills, Hatcher's Run Feb. 5-7, 1865. Appomattox Campaign March 28-April 9. Assault on and fall of Petersburg April 2. Pursuit of Lee April 3-9. Sailor's Creek April 6. Appomattox C. H. April 9. Surrender of Lee and his army. At Farmville and Burkesville till April 23. March to Danville April 23-27 and duty there till May 24. March to Richmond, thence to Washington, D.C., May 24-June 3. Corps review June 8. Duty at Washington till August. Mustered out August 18, 1865.

Regiment lost during service 12 Officers and 242 Enlisted men killed and mortally wounded and 2 Officers and 171 Enlisted men by disease. Total 427.

1st BATTERY LIGHT ARTILLERY.

Organized at West Meriden and mustered in October 26, 1861. Left State for Hilton Head, S.C., January 13, 1862. Attached to Sherman's expeditionary corps to April, 1862. 3rd Brigade, 2nd Division, Dept. of the South, to July, 1862. District of Beaufort, S. C., Dept. of the South, to September, 1862. District of Beaufort, S.C., 10th Army Corps, Dept. of the South to June, 1863. United States forces Folly Island, S.C., 10th Corps, Dept. of the South, to April, 1864. Artillery, 1st Division, 10th Army Corps, Dept. of Virginia and North Carolina to August, 1864. Artillery Brigade, 10th Army Corps to December, 1864. Artillery Brigade, 25th Army Corps, Dept. of Virginia to June, 1865.

SERVICE.--Duty at Hilton Head, S. C., till May, 1862. Expedition to James Island and operations against Charleston, S.C., May 31-June 28. Battle of Secessionville June 16. Evacuation of James Island and movement to Hilton Head, S.C., May 28-July 7. Expedition to St. John's Bluff, Fla., September 30-October 13. Expedition to Pocotaligo October 21-23. Frampton's Plantation, Pocotaligo, October 22. Duty at Hilton Head and at Beaufort, S.C., till June, 1863. Moved to Folly Island, S.C. Expedition to James Island July 9-16. Williston Bluff, Port Pon River July 10. Action on James Island July 16. Siege operations against Forts Wagner and Gregg, Morris Island and against Fort Sumter and Charleston, S.C., from Folly Island till April, 1864. Moved from Folly Island, S.C., to Gloucester Point, Va., April 18-23. Butler's operations on south side of the James and against Petersburg and Richmond May 4-June 21. Chester Station May 10. Operations against Fort Darling May 12-16. Battle of Drewry's Bluff May 14-16. Proctor's Creek May 14. On the Bermuda front May 17-June 21. Port Walthal June 16-17. Siege operations against Petersburg and Richmond June 16, 1864, to April 2, 1865. Moved to Deep Bottom, Va., June 21, 1864, and duty there till August 25. Actions at Deep Bottom July 21 and 27-28. Strawberry Plains, Deep Bottom, August 14-18. Moved to Petersburg front August 25 and duty in trenches before that city till September 28. Moved to Deep Bottom September 28. Battle of Chaffin's Farm, New Market Heights, September 29-30. Duty in trenches before Richmond till April, 1865. Occupation of Richmond April 3. Duty at Richmond and Manchester till June. Mustered out June 11, 1865.

Battery lost during service 1 Officer and 3 Enlisted men killed and mortally wounded and 21 Enlisted men by disease. Total 25.

2nd BATTERY LIGHT ARTILLERY.

Organized at Bridgeport September 10, 1862. Left State for Washington, D.C., October 15. Attached to 2nd Brigade, Casey's Division, Military District of Washington, to February, 1863. 2nd Brigade, Casey's Division, 22nd Army Corps, Dept. of Washington, to April, 1863. Artillery Abercrombie's Division, 22nd Corps, to June, 1863. 2nd Volunteer Brigade, Artillery Reserve Army Potomac to August, 1863. Artillery Dept. of the East to October, 1863. Camp Barry, Washington, D.C., 22nd Corps, to February, 1864. Defences of New Orleans, La., Dept. of the Gulf, to June, 1864. Artillery 4th Division, 13th Army Corps, Dept. of the Gulf, June, 1864. Defences of New Orleans, Dept. Gulf, to August, 1864. Unattached artillery 19th Army Corps, Dept. Gulf, to December, 1864. Artillery Reserve Corps Military Division West Mississippi to February, 1865. Artillery 2nd Division, Reserve Corps, February, 1865. Artillery 2nd Division, 13th Army Corps, Military Division West Mississippi, to August, 1865.

SERVICE.--Duty at Camp Barry, Defences of Washington, D.C., till January, 1863, and near Wolf Run Shoals, Va., to June, 1863. Battle of Gettysburg, Pa., July 1-4. Moved to Washington, D.C., and duty there till August 15. Moved to New York City August 15 and duty there and at various points in New York State till October 12. Moved to Washington October 12 and duty there till January, 1864. Moved to New Orleans, La., thence to Brashear City and duty there till June 17. At Algiers till July 31. Expedition to Mobile Bay July 31-September 8. Operations against Fort Gaines August 2-8 and against Fort Morgan August 9-23. Duty at Fort Gaines till September 8. Moved to Algiers September 8, thence to New Orleans September 19, and duty there till November 13. Moved to mouth of White River, Ark., November 13 and duty there till February, 1865. Moved to Kennerville, La., thence to Barrancas, Fla. Expedition to Fort Blakely, Mobile Bay, March 11-April 1. Occupation of Canoe Station March 27. Siege of Fort Blakely April 1-9. Assault on and capture of Fort Blakely April 9. Occupation of Mobile April 12. Duty at Mobile and Selma, Ala., till July. Moved to New Orleans, thence to New Haven, Conn., arriving there July 31. Mustered out August 9, 1865.

Battery lost during Service 2 Enlisted men killed and 19 Enlisted men by disease. Total 21.

3rd BATTERY LIGHT ARTILLERY.

Organized at New Haven August to October, 1864. Moved to City Point, Va., November 16-19, 1864. Attached to defences of City Point, Va., Dept. of Virginia and North Carolina, to December, 1864. Siege artillery Army of the James and Army of the Potomac to June, 1865.

SERVICE.--Duty in the defences of City Point, Va. Occupying redoubts 2, 5, 7 and 8 till June, 1865. Repulse of attack on City Point by rebel ironclads January 24-25. Mustered out June 23, 1865.

Battery lost during service 4 Enlisted men killed and 1 Enlisted man by disease. Total 5.