1st Wisconsin Heavy Artillery Regiment

Batteries B, C and D served outside the Eastern Threater. The Regiment (including Batteries B-D) lost 4 enlisted men killed and mortally wounded and 2 officers and 77 enlisted men by disease, a total of 83.

Timeline of Battery A, 1st Wisconsin Heavy Artillery Regiment

August, 1861	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
May, 1862	Attached to Whipple's Command, Military District of Washington
February, 1863	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
March, 1864	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
August 18, 1865	Mustered out

Timeline of Batteries E - M, 1st Wisconsin Heavy Artillery Regiment

September and October, 1864

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'Rourke

Companies 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, 1865

Mustered out