The Seventh Wisconsin Infantry was organized at Camp Randall, Madison, WI, and mustered into the service of the United States on the 16th of September, 1861, leaving the state on the 21st and reaching Washington, D.C., October 1, 1861. It joined General King's command, becoming part of the same "Iron Brigade" to which the Sixth Wisconsin had heretofore been assigned, and continued in the same brigade, division and corps with the Sixth until the surrender of the Confederates under General Lee to the Union Army commanded by Gen. Grant, April 9, 1865, serving in all the campaigns fought by the Army of the Potomac except the Peninsular Campaign. The Seventh took part in the Grand Review at Washington and shortly thereafter was, with regiments of the Army of the Potomac, transferred to Louisville, KY, where it was mustered out of the service of the United States July 3, 1865, returned to Madison, WI, July 5, 1865, and was disbanded. Companies of the Wisconsin 7th Infantry Regiment Company A - Columbia County, Lafayette County, Chippewa County and Dane County Company B - Columbia County Company C - Grant County and Iowa County Company D - Dane County Company E - Marquette County and Waushara County Company F - Grant County Company G - Wood County, Portage County and Polk County Company H - Grant County and Vernon County Company I - Waushara County Company K - Walworth County