The boulders of Devils Den formed the flank of the Union’s Third Corps on the second day. Confederate troops said the small hill with artillery looked like a volcano. It was defended by troops from Brig Gen J.H. Wards Second Brigade of the First Division. They were attacked by units from Law’s and Robertson’s Brigades from Hoods Division and the confederate troops took Devil’s Den than pushed on up Little Round Top. Sharpshooters from Devil’s Den killed several Union officers as they organized Union troops on Little Round Top.