Batteries B, C and D served outside the Eastern Threater. The regiment (including Batteries B-D) lost 4 enlisted men killed or mortally wounded and 2 officers and 77 enlisted men by disease.

1864
September – October Organized and ordered to Washington, D.C. Attached to 3rd Brigade, DeRussy’s Division, 22nd Army Corps
December Attached to 4th Brigade, DeRussy’s Division, 22nd Army Corps. Assigned to duty in the Defenses of Washington, D. C.:Company E at Fort O’RourkeCompanies F and I at Fort Ellsworth

Company G at Forts Lyon and Ellsworth

Companies H and K at Fort Lyon

Company L at Fort Willard

Company M at Forts Lyon, Weed and Farnsworth

1865
June 26 Mustered out