American Civil War Union Infantry the Iron Brigade

The Iron Brigade, also known as The Black Hats, Black Hat Brigade, Iron Brigade of the West, and originally King's Wisconsin Brigade was an infantry brigade in the Union Army of the Potomac during the American Civil War. it was composed of regiments from three Western states that are now within the region of the Midwest. Noted for its excellent discipline, ferocity in battle, and extraordinarily strong morale, the Iron Brigade suffered 1,131 men killed out of 7,257 total enlistments: the highest percentage of loss suffered by any brigade in the United States Army during the war.
The Iron Brigade initially consisted of the 2nd, 6th, and 7th Wisconsin Volunteer Infantry Regiments, the 19th Indiana, Battery B of the 4th U.S. Light Artillery, and was later joined by the 24th Michigan.