The 5th Heavy Artillery lost 3 enlisted men killed and 46 to disease in the Civil War.

1864

August and September Organized as the 204th Volunteers at Pittsburg under Colonel George S. Gallupe, Lt. Colonel Joseph Browne and Majors Michael Baer, George Irwin and Howard Morton
September Ordered to Washington, D.C.
September Attached to District of Alexandria, 22nd Corps. Duty in Northern Defenses of Washington, D. C., and along Manassas Gap Railroad, protecting supplies for Sheridan, and constantly engaged with Mosby.
October 4 Action at Salem
October 7 Rectortown
October 11 White Plains
October and November Destruction of Manassas Gap Railroad
October 27 Major Morton discharged
November Assigned to 1st Separate Brigade, 22nd Corps

Duty in the Northern Defenses of Washington:

1st Battalion at Prospect Hill

2nd Battalion at Vienna

3rd Battalion at Fairfax C. H.

1865

Spring Duty on Bull Run battlefield burying nearly 2,000 dead.
May 10 Captain William Hope of Battery A promoted to major
June Ordered to Pittsburg for muster out.
June 30, 1865 Mustered out under Colonel Gallupe, Lt. Colonel Browne and Majors Baer, Hope and Irwin