Whakaotihia te rerenga e whai ake nei: Mo te nuinga o nga tau e rua tuatahi, i mahi te 70 o Indiana i nga mahi torotoro me te tiaki i nga tereina i Kentucky me Tennessee. I te tau 1864, ka uru atu a Harrison me tana ope ki te pakanga a William T. Sherman ki Atlanta ka neke ki nga raina o mua. I te Hanuere 2, 1864, i whakatairangahia a Harrison ki te whakahau i te 1st Brigade o te 1st Division o te XX Corps. I whakahaua e ia te pirihimana i nga pakanga o Resaca, Cassville, New Hope Church, Lost Mountain, Kennesaw Mountain, Marietta, Peachtree Creek, me
Ko Atlanta. I te wa i timata ai te kaha nui o Sherman ki te Moana, i whakawhitihia te piriti o Harrison ki te Takiwa o Etowah ka uru ki te Pakanga o Nashville.