Tuhia he tomokanga mo tenei whitianga - I whakawhiwhia ki te I Corps, i te Pipiri 1862, i tukuna te wehenga ki te Peninsula o Virginia i reira i mahi ai me te V Corps o te Army of the Potomac i te Peninsula Campaign. Katahi ka hoki mai te wehenga ki tana roopu tawhito (i taua wa i tohua ko te III Corps i te Ope o Virginia) i te Wahanga Tuarua o Bull Run. Ko te hanganga matua o te wehenga i whakahoki ano i tana tohu I Corps i mua noa o te kaupapa Antietam i te wa i uru mai ai ki te Army of the Potomac. I uru te wehenga ki nga pakanga o South Mountain, Antietam, me Fredericksburg, i tino wehewehe i Fredericksburg, i uru ai ki nga raina Confederate. I waenga i Fredericksburg me Gettysburg, ko te wehenga he waahanga o te XXII Corps i tohaina ki Washington, DC He waahanga ano o te V Corps mo te Pakanga o Gettysburg, i reira i wehewehe ai ia i te Hurae 2, 1863, e whawhai ana i te taha o Little Round Top. Kotahi te piritanga i peia nga ope o te Rōpū mai i nga taha ki te hauauru o Little Round Top ki te Wheatfield. I raro i a Crawford, ka whawhai tonu nga Pennsylvania Reserves ki te Ope o te Potomac tae noa ki mua noa o te Pakanga o te Hahi o Bethesda, te Pakanga o Totopotomoy Creek ranei
, i te mutunga o te toru tau o te whakaurunga o nga tangata.