There were at least two Iron Brigades: 1st Iron Brigade or Iron Brigade of the East: 22nd, 24th, 30th NY, 14th Rgt & 2nd US Sharpshooters Iron Brigade or Iron Brigade of the West: 2nd, 6th, and 7th WI, 19th IN, Battery B 4th US Lt ART + later 24th MI They both served in the AoP and in fact were in t...