Mezue ahịrịokwu na-esonụ: Gibbon laghachiri n'ọchịchị nke Ngalaba nke Abụọ n'oge Ọchịagha Grant Overland Campaign na Mee na June 1864, na-ahụ ihe na-eme na agha nke Wilderness, Spotsylvania Court House, na Cold Harbor. Na June 7, 1864, e buliri ya n'ọkwa onye isi ndị ọrụ afọ ofufo. N'oge nnọchibido nke Petersburg na-esochi (June 1864 ruo April 1865), Gibbon nwere nkụda mmụọ mgbe ndị agha ya jụrụ ịlụ ọgụ na
Ụlọọrụ Ream n'August 1864. O duziri ndị agha nke XVIII nwa oge tupu ọ laa ezumike ọrịa, mana ọrụ ya bara oke uru, ọ laghachiri iduzi ndị agha nke XXIV e hiwere ọhụrụ na ndị agha nke James. Ndị agha ya nyere aka nweta ihe ịga nke ọma na Agha nke Atọ nke Petersburg n'April 1865, na-ejide Fort Gregg, akụkụ nke nchebe Confederate. N'oge Appomattox Campaign, o nyere aka igbochi ụzọ mgbapụ ndị Confederate na Agha nke Appomattox Courthouse, nke mere ka Gen. Lee nyefee onwe ya. Ọ bụ otu n'ime ndị kọmishọna atọ maka ndị Confederate.