Organized at madison, wisconsin and, mustered in september 2, 1861. Left state for washington, d.C., september 21. The unit would see exclusive service in the eastern theatre. Service: duty in the defences of washington, d.C., till march, 1862. Advance on manassas, virginia., march 10-16., advance to falmouth april 9-19. Operations against jackson june 2-11, reconnaissance to orange court house july 24-27,. Reconnaissance to frederick’s hall station and spotsylvania court house august 5-8., thornburg’s mills (or massaponax church), battle of cedar mountain august 9. Pope’s campaign in northern virginia august 16-september 2. Fords of the rappahannock august 21-23. Action at gainesville august 28, battles of groveton, bull run, chantilly, maryland campaign, battles of south mountain, maryland., september 14, antietam, advance to falmouth, virginia, fredericksburg, mud march, expedition to heathsville february 12-14, chancellorsviile campaign, operations at pollock’s mill creek, fitzhugh’s crossing, chancellorsviile, gettysburg (pa.) campaign, june 11-july 24,.Gettysburg, haymarket, mine run campaign, campaign from the rapidan to the james river may 4-june 15, 1864, wilderness, laurel hill, spotsylvania, spotsylvania court house, bloody angle, north anna river, jericho ford, cold harbor, bethesda church siege of petersburg june 16, 1864, to april 2, 1865, weldon railroad, boydton road, hatcher’s run, dabney’s mills, hatcher’s run, appomattox campaign march 28-april 9,. Lewis farm, boydton and white oak roads, five forks, appomattox court house. Regiment lost during service 10 officers and 271 enlisted men killed and mortally wounded and 143 enlisted men by disease, a total of 424. The first issue of flags to the unit would be made by two manufacturers. The national flag, made by gilbert hubbard & co of chicago and, follows a standard format. The original flag was virtually destroyed at gettysburg by canister fire, causing the staff to be replaced by a branch on the field of gettysburg the regimental or state flag was made by mrs r. C. Powers of madison, wisconsin and, bears the national arms. This flag would be retired in june 1863. The originals are housed in the wisconsin veterans museum, madison, wisconsin.