Whakaotihia te rerenga e whai ake nei: I uru a Shaw ki te ope taua o te Uniana mo te Pakanga a-Iwi o Amerika, ka uru atu ki te Kamupene A, 35th New York Volunteer Infantry Regiment hei tangata takitahi i te Pipiri 1861. I muri mai ka whakatairangahia ia ki te corporal, a ka mahi ia kia tae ra ano ki te toenga o tana rerenga i te Pipiri 1863. I uru a Shaw ki nga mahi a te puhi i Virginia me Maryland, tae atu ki; te hanganga o Fort Tillinghast me Fort Craig (te ngahuru 1861); tiaki me te tiaki i roto me te taha o Falls Church, Virginia (te hotoke 1861-1862); tiaki me te tiaki i roto me te taha o Falmouth, Virginia (te puna 1862); nga pakanga i te Rappahannock Station, White Sulphur Springs, me Gainesville (te raumati 1862); Te Pakanga Tuarua o Bull Run (Akuhata 1862);
Chantilly (Hepetema 1862); Maunga ki te Tonga (Hepetema 1862); Antietam (Hepetema 1862); me Fredericksburg (Hune 1862). I te marama o Hanuere, 1863, i whakawhiwhia te puhi ki te brigade kaitiaki kaitiaki i Falmouth, a i mahi ano hoki i nga mahi tiaki me nga mahi tirotiro i te tereina o Aquia Creek. I te marama o Mei, ka wehe atu te rerenga i Maryland ki New York kia taea ai te kohikohi.