|3rd Wisconsin Volunteer Infantry Regiment|
|Active||June 19, 1861 to July 18, 1865|
|Engagements||Battle of Cedar Mountain
Battle of Antietam
Battle of Chancellorsville
Battle of Gettysburg,
Battle of Kennesaw Mountain
Battle of Bentonville
The 3rd Wisconsin assembled at Fond du Lac, Wisconsin, and mustered into Federal service on June 19, 1861.
The 3rd Wisconsin Infantry initially mustered 979 men and later recruited an additional 940 men, for a total of 1919 men. The regiment lost 9 officers and 158 enlisted men killed in action or who later died of their wounds, plus another 2 officers and 113 enlisted men who died of disease, for a total of 282 fatalities.