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24th Michigan Monument, Gettysburg National Military Park
The Iron Brigade, also known as the Iron Brigade of the West or the Black Hat Brigade, was an infantry brigade in the Union Army of the Potomac during the American Civil War. Although it fought entirely in the Eastern Theater, it was composed of regiments from Western states (states that are today considered Midwestern). Noted for its strong discipline, its unique uniform appearance, and its tenacious fighting ability, the Iron Brigade suffered the highest percentage of casualties of any brigade in the war.

The nickname "Iron Brigade", with its connotation of fighting men with iron dispositions, was applied formally or informally to a number of units in the Civil War and in later conflicts. The Iron Brigade of the West was the unit that received the most lasting publicity in its use of the nickname.

Brigade nickname

The Iron Brigade initially consisted of the 2nd, 6th, and 7th Wisconsin Volunteer Infantry Regiments, along with the 19th Indiana, and was later joined by the 24th Michigan. This composition of men from three Western states led it to be sometimes referred to as the Iron Brigade of the West. They were known throughout the war as the Black Hats because of the black 1858 model Hardee hats issued to Army regulars, rather than the blue kepis worn in most other units.

The all-Western brigade earned its famous nickname while under the command of Brig. Gen. John Gibbon, who led the brigade in its first battle at Brawner's Farm on (August 28, 1862), a prelude to the Second Battle of Bull Runmarker, where it stood up against attacks from a superior force under Maj. Gen. Thomas J. "Stonewall" Jackson. The designation "Iron Brigade" is said to have originated during the brigade's action at Turners Gap, during the Battle of South Mountainmarker, a prelude to the Battle of Antietammarker in September 1862. Maj. Gen. Joseph Hooker, commanding I Corps, approached Army of the Potomac commander Maj. Gen. George B. McClellan, seeking orders. As the Western men advanced up the National Road, forcing the Confederate line all the way back to the gap, McClellan asked, "What troops are those fighting in the Pike?" Hooker replied, "[Brigadier] General Gibbon's brigade of Western men." McClellan stated, "They must be made of iron." Hooker said that the brigade had performed even more superbly at Second Bull Run; to this, McClellan said that the brigade consisted of the "best troops in the world". Hooker supposedly was elated and rode off without his orders. There are a few stories related to the origin, but the men immediately adopted the name, which was quickly used in print after South Mountain. .

Brigade history

The unit that became known as the Iron Brigade was activated on October 1, 1861, upon the arrival in Washington, D.C.marker, of the 7th Wisconsin. It was combined into a brigade with the 2nd and 6th Wisconsin, and the 19th Indiana, under the command of Brig. Gen. Rufus King. The governor of Wisconsin, Alexander Randall, had hoped to see the formation of an entirely Wisconsin brigade, but the Army unwittingly frustrated his plans by transferring the 5th Wisconsin from King's brigade and including the Hoosiers instead. This brigade was initially designated the 3rd Brigade of Maj. Gen. Irvin McDowell's division of the Army of the Potomac, and then the 3rd Brigade, I Corps.

McDowell's I Corps did not join the bulk of the Army of the Potomac in the Peninsula Campaign. In June 1862 it was redesignated the III Corps of Maj. Gen. John Pope's Army of Virginia. Now under the command of John Gibbon, King's brigade was designated the 4th Brigade, 1st division, III Corps, and it saw its first combat in the Northern Virginia Campaignmarker. Almost immediately following the Union defeat in the Second Battle of Bull Run, the III Corps was transferred back to the Army of the Potomac and redesignated the I Corps, under the command of Joseph Hooker; Gibbon's brigade became the 4th Brigade, 1st Division, I Corps.

The 24th Michigan joined the brigade on October 8, 1862, prior to the Battle of Fredericksburgmarker in December. On February 27, 1863, the brigade, now under the command of Brig. Gen. Solomon Meredith, was redesignated the 1st Brigade, 1st Division, I Corps.

The brigade commanders, disregarding temporary assignments, were:

The Iron Brigade lost its all-Western status on July 16, 1863, following its crippling losses at Gettysburg, when the 167th Pennsylvania was incorporated into it. However, the brigade that succeeded it, which included the survivors of the Iron Brigade, was commanded by:

In June 1865, the units of the surviving brigade were separated and reassigned to the Army of the Tennessee.

The brigade fought in the Second Bull Run, Antietam, Fredericksburg, Chancellorsville, Gettysburg, Mine Run, Overland, Richmond-Petersburgmarker, and Appomattoxmarker campaigns.

The brigade took pride in its designation, "1st Brigade, 1st Division, I Corps", under which it played a prominent role in the first day of the Battle of Gettysburgmarker, July 1, 1863. It repulsed the first Confederate offensive through Herbst's Woods, capturing much of Brig. Gen. James J. Archer's brigade, and Archer himself. The 6th Wisconsin (along with 100 men of the brigade guard) are remembered for their famous charge on an unfinished railroad cut north and west of the town, where they captured the flag of the 2nd Mississippi and took hundreds of Confederate prisoners.

The Iron Brigade, proportionately, suffered the most casualties of any brigade in the Civil War. For example, 61% (1,153 out of 1,885) were casualties at Gettysburg. Similarly, the 2nd Wisconsin, which suffered 77% casualties at Gettysburg, suffered the most throughout the war; it was second only to the 24th Michigan (also an Iron Brigade regiment) in total casualties at Gettysburg. The latter regiment lost 397 out of 496 soldiers, an 80% casualty rate.

Other Iron Brigades

There were and are other brigades known to some extent by the same nickname:

  • Another brigade in the Army of the Potomac had previously been known as the Iron Brigade (later the Iron Brigade of the East or First Iron Brigade to avoid confusion). This unit was the 1st Brigade, 1st Division, I Corps, prior to Meredith's brigade getting that designation. It consisted of the 22nd New York, 24th New York, 30th New York, 14th Regiment , and 2nd U.S. Sharpshooters. Although this Iron Brigade of the East served in the same infantry division as the Iron Brigade of the West, press attention focused primarily on the latter. Most of the Eastern regiments were mustered out before the Battle of Gettysburgmarker, where the remaining Eastern Iron Brigade Regiments and the Iron Brigade of the West arguably achieved their greatest fame.

  • Recent scholarship identifies two other brigades referred to by their members or others as "The Iron Brigade":
    • 3rd Brigade, 1st Division, III Corps (17th Maine, 3rd Michigan, 5th Michigan, 1st, 37th, and 101st New York)
    • Reno's Brigade from the North Carolina expedition (21st and 35th Massachusetts, 51st Pennsylvania, and 51st New York)

  • The 2nd Brigade of the U.S. Army's 1st Armored Division has carried the Iron Brigade moniker since 1985 and was previously called the "Black Hat" Brigade.

  • The 3rd Brigade of the 4th Infantry Division is also known as the Iron Brigade. Its unit crest is similar to the medals issued to veterans of the both Western and the Eastern Iron Brigades of the Army of the Potomac.

  • The 1st Heavy Brigade Combat Team of the 2nd Infantry Division (United States) is known as the Iron Brigade as well. Located at Camp Casey Korea, the brigade has a critical role of military deterrence on the Korean Peninsula.


  1. Herdegen, p. 244.
  2. Nolan, p. 28.
  3. Eicher, p. 334.
  4. Herdegen, Beaudot, p. 207.
  5. Clemens, Tom, Will the Real Iron Brigade Please Stand Up? (August 2000 presentation to the Richmond, Virginia, Civil War Round Table.)
  6. See unit crest illustration at


  • Beaudot, William J. K., and Herdegen, Lance J., In the Bloody Railroad Cut at Gettysburg, Morningside, 1990, ISBN 0-89029-535-7.
  • Eicher, John H., and Eicher, David J., Civil War High Commands, Stanford University Press, 2001, ISBN 0-8047-3641-3.
  • Fox, William F., Regimental Losses in the American Civil War, reprinted by Morningside Bookshop, Dayton, Ohio, 1993, ISBN 0-685-72194-9.
  • Herdegen, Lance J., The Men Stood Like Iron: How the Iron Brigade Won Its Name, Indiana University Press, 1997, ISBN 0-253-33221-4.
  • Nolan, Alan T., The Iron Brigade, A Military History, Indiana University Press, 1961, ISBN 0-253-34102-7.

Further reading

  • Wert, Jeffry D., A Brotherhood of Valor: The Common Soldiers of the Stonewall Brigade, C.S.A., and the Iron Brigade, U.S.A., Touchstone, 1999, ISBN 978-0684862446.

External links

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