 Hays akatorazve kutungamira kwe63rd Pennsylvania panguva yeNorthern Virginia Campaign muna Nyamavhuvhu uye zvakare akatungamira mhosva muHondo yechipiri yeBull Run, achigamuchira maronda anorwadza akapwanya gumbo rake. Achiri kupora, akagadzwa kuva brigadier general wevazvipiri, September 29, 1862. Pakuvamba muna 1863 Hays akagadzwa kuva mukuru mukuru webrigade muXXII Corps mukudzivirira kweWashington, D.C. Brigade rake, rakagadzirwa zvikurukuru nemauto akazvipira mushure meHondo yeHarpers Ferry, yakawedzerwa kuHondo yePotomac se3rd Brigade, 3rd Division, II Corps. 