Faatumu le fuaiupu lenei: Ina ua amata le Taua Faalemalo, na tofia ai Keriso i le aso 21 o Aperila, 1861, e avea ma luteneta kolone o le 5th Pennsylvania Infantry. Na ia auai i le 25 Iulai i le faaiuga o le tolu masina o le tautua a le regiment. I le masina o Setema, na tofia ai o ia e avea ma kolone o le 50th Pennsylvania Infantry, ma auai ai i le Taua o Port Royal. E leʻi umi ae avea o ia ma taʻitaʻi o le 1st Brigade, 1st Division of the IX Corps. I le
O Chantilly, na avea ma taʻitaʻi lē tumau o lana vaega ina ua maliu Isaac Stevens. Na toe foʻi o ia i le taʻitaʻiga o le 1st Brigade ma tau i taua i South Mountain ma Antietam e latalata i le Burnside's Bridge. E leʻi leva ona mavae le osofaʻiga i Antietam, ae siitia atu loa o ia i le vaega lona lua o le vaega muamua. Na ia taʻitaʻia lenei vaega i le Taua i Fredericksburg. Na avea Christ ma ta'ita'i o le 3rd Brigade, 2nd Division i le IX Corps i le taimi o le Siege o Vicksburg ae na toe fo'i atu i le ta'ita'iga o le 2nd Brigade i le taimi o le Knoxville Campaign. I le tautotogo o le 1864 na toe siitia ai le IX Corps i le itu i Sasaʻe ma na pule ai Keriso i le 2nd Brigade i le 3rd Division ma tau i taua o le Wilderness, Spotsylvania, Cold Harbor. Ina ua osofaʻia e le ʻautau a le Iuni le fale o le ʻau Confederate i Petersburg, na manuʻa ai Keriso. E na o sina taimi puupuu lava na tuua ai le malae ae toe foʻi atu e pule i le 1st Brigade, 3rd Division i le IX Corps. Na faaauupegaina o ia iā Setema 30, 1864.