 There have been other brigades known by the same name.Use of the "Iron Brigade" name is not taken lightly in the U.S. Army, and the present-day units that have taken "Iron Brigade" as their nickname have proven themselves in battle as worthy to hold the name.Another brigade, in the Army of the Potomac, had previously been the first Iron Brigade, in the Union Army and later as the "Iron Brigade of the East" or "First Iron Brigade", to avoid confusion.