Wis. Stat. § 84.1038: Iron Brigade Memorial Highway.

The department shall designate and mark, consistent with any standards that may be developed by the department for memorial highway designations, USH 12 from the state line in Walworth County to the state line in St. Croix County as the “Iron Brigade Memorial Highway” as a living memorial to and in honor of the members of the Second, Sixth and Seventh Wisconsin regiments who served in the Iron Brigade of the Union army in the Civil War of 1861 to 1865.