I roto i te Hōngongoi 1861 i whakaritea e te Colonel J. W. Bissell, a ko Henry Flad te rangatira o te Kamupene B. I te marama o Akuhata o taua tau ano i whakauruhia ia e General Frémont, i te wa e whakahau ana i St. Louis, mo te mahi i roto i te hanganga o nga whakapae i Cape Girardeau, Missouri, i noho ai ia mo etahi marama. I muri mai i te tau, i te wa i whai mana ai a Frémont e General Halleck, i whakahaua a Kapene Flad ki te hono atu ki a General Pope i te tonga-rawhiti o Missouri, a ka mahi hei rangatira kaimahi i roto i te pakanga o New Madrid me Point Pleasant me te tango i te Motu Nama Tekau, i muri mai ka hoki mai ia ki tana rerenga i New Madrid. I a ia me tana puhi i Fort Pillow me Pittsburgh Landing
me ngā mahi i mua i Koriniti. I te raumati o te tau 1862 i mahi ia ki te whakatika i te Mobile me Ohio Railroad, i te hanga i nga pa kaha i Koriniti, me te whakatika i te Mississippi Central Railroad. I uru hoki ia ki te whakaekenga a Grant ki Grenada. I te Hui-tanguru, 1863, i whakahaua ia ki Young's Point, i reira ia i mahi ai i nga mahi hangarau, i muri mai i Baxter Bayou, Lake Providence, me Bayou Macon.