The 33rd New York Independent Battery lost 1 officer and 12 enlisted men to disease during the Civil War.
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1863
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| Organized at Buffalo, N.Y. | |
| September 4 | Mustered in at Elmira, N.Y. and left State for Washington, D.C. |
| September | Duty at Camp Barry, Defenses of Washington, 22nd Army Corps |
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1864
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| February | At Yorktown and Gloucester Point, Va. Attached to United States Forces, Yorktown, Va., Dept. of Virginia and North Carolina |
| April | Attache to Artillery, 3rd Division, 10th Army Corps, Army of the James |
| May 4-28 | Butler’s operations on south side of the James River and against Petersburg and Richmond |
| May 5 | Occupation of City Point and Bermuda Hundred, Va. attached to Artillery, 10th Army Corps |
| May 8-10 | Swift Creek |
| May 12-16 | Operations against Fort Darling |
| May 14-16 | Battle of Drury’s Bluff |
| May 16-June 15 | Bermuda Hundred |
| June 2 | Action at Bermuda Hundred |
| June 15 | Siege operations against Petersburg and Richmond. Attached to Artillery, 3rd Division, 10th Army Corps. |
| June 15-18 | Assaults on Petersburg |
| August | Attached to Artillery Brigade, 10th Army Corps |
| October | Attached to Separate Brigade, Dept. of Virginia and North Carolina. Assigned to duty as Garrison Artillery at Fort Pocahontas on James River. |
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1865
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| January | Duty in the Defenses of Bermuda Hundred, Va. Attached to Ferrero’s Division, Defenses of Bermuda Hundred, Va. |
| March 28-April 2 | Operations resulting in the fall of Petersburg and Richmond |
| April-June | Duty at Petersburg. Attached to Dept. of Virginia. |
| June 25 | Mustered out |