Buuxi weedhan soo socota: Bishii Luulyo 1861 guuto loo yaqaano Engineer Regiment of the West oo laga soo qortay gobollada Illinois iyo Missouri, waxaa abaabulay Col. J. W. Bissell, waxaana Henry Flad loo magacaabay kabtanka shirkadda B. Bishii Ogosto ee isla sanadkaas waxaa u xilsaaray General Frémont, ka dibna wuxuu ahaa taliyaha St. Louis, si uu ugu adeego dhismaha qalcado ku yaal Cape Girardeau, Missouri, halkaas oo uu ku sugnaa dhowr bilood. Sanadkaas ka dib, markii Frémont uu ku guuleystay General Halleck, Captain Flad waxaa lagu amray inuu ku biiro General Pope koonfurta bari ee Missouri, wuxuuna u adeegay sarkaal shaqaale ah ololaha New Madrid iyo Point Pleasant iyo qaadashada Jasiiradda Number Ten, ka dib markii uu ku soo biiray guushiisa New Madrid. Wuxuu la joogay ciidankiisii Fort Pillow iyo
Pittsburgh iyo howlgaladii ka horeeyay Corinth. Xilligii xagaaga ee 1862 wuxuu ku hawlan yahay dayactirka Mobile iyo Ohio Railroad, dhismaha qalcado ku yaal Korintos, iyo dayactirka Mississippi Central Railroad. Waxa kale oo uu ka qeyb qaatay duulaankii Grant ee Grenada. Bishii Febraayo, 1863, waxaa lagu amray inuu tago Young's Point, halkaas oo uu ka shaqeynayay shaqada injineernimada, sida uu markii dambe u ahaa Baxter Bayou, Lake Providence, iyo Bayou Macon.