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.
|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
|June 26||Mustered out|