Tuhia tētahi tohutoro mō tēnei wāhanga - I uru a Johnson ki te ope taua o te Kotahitanga i te 15 o ōna tau. I whakauruhia ia ki te Kamupene H o te 43rd Ohio Infantry Regiment. I whakawhiwhia te puhi ki te whakahau o te XVI Corps i te Wahanga Tuawha, engari i te puna o te tau 1864, i tukuna a Johnson ki te Wahanga Tuatahi o te XVII Corps. I reira, i mahi ia i raro i a General John W. Sprague. I te Mei 1, 1864, ka hono atu te ope a Johnson ki te ope a General William Tecumseh Sherman i Chattanooga. Ko te pakanga tuatahi i uru atu ai a Johnson ki te waahi i whakaekehia ai ia ko te Pakanga o Decatur. I whiwhi a Johnson i tetahi wharanga waewae iti, i runga ake i te hononga turi maui, i te Pakanga o Resaca. I uru tonu a Johnson ki nga pakanga a muri ake nei, penei i te Pakanga o Dallas, te Pakanga o Kennesaw Mountain, me te Pakanga o Peachtree Creek. I muri i te hinganga o Atlanta
, I mahi a Johnson hei kaitiaki mo te General Sprague, he tuunga i mahi ia tae noa ki tana wehenga i te mutunga o te pakanga. Whai muri i te pakanga, ka hoki a Johnson ki Lorain County, Ohio.