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.

1861

August Organized as Company K, 2nd Wisconsin Infantry. Detached from Regiment , and assigned to duty as Heavy Artillery at Forts Corcoran, Marcy and Ethan Allen, Defenses of Washington, D.C.
October 10 Rejoined Regiment
December 9 Permanently detached as Battery A, 1st Wisconsin Heavy Artillery. Attached to Military District of Washington

1862

May Attached to Whipple’s Command, Military District of Washington

1863

February Attached to Defenses of Alexandria, 22nd Army Corps
April Attached to 1st Brigade, DeRussy’s Division, 22nd Army Corps
May Attached to 3rd Brigade, DeRussy’s Division, 22nd Army Corps
December Attached to 4th Brigade, DeRussy’s Division, 22nd Army Corps

1864

March Attached to 3rd Brigade, DeRussy’s Division, 22nd Army Corps
May Attached to 2nd Brigade, DeRussy’s Division, 22nd Army Corps. Assigned to duty in the Defenses of Washington, D.C., at Forts Cass, Buffalo, Ellsworth, Worth, Rodgers and Willard
July 11-12 Defense of Washington against Early’s attack

1865

August 18 Mustered out