43rd Regiment, Wisconsin Infantry.

''United States  U.S. Military   Wisconsin     Wisconsin Military   Wisconsin in the Civil War 43rd Regiment, Wisconsin Infantry

Brief History
Oganized at Madison, Wisconsin, and mustered in by Companies August 8 to September 30, 1864 Mustered out June 24,1865.

Companies in this Regiment with the Counties of Origin
Men often enlisted in a company recruited in the counties where they lived though not always. After many battles, companies might be combined because so many men were killed or wounded. However if you are unsure which company your ancestor was in, try the company recruited in his county first.