Kammala jumla mai zuwa: Bayan da aka tsara, an sanya sabon rundunar zuwa Brigade na Missouri na farko. An tura Brigade na Missouri na farko, wanda Colonel Francis M. Cockrell ya umurce shi, zuwa kusa da Grand Gulf, Mississippi a farkon Maris 1863. Duk da yake a Grand Gulf, rundunar ta gina gine-gine. Na 1 da na 4 na Missouri (Consolidated), tare da 2nd Missouri Infantry, 3rd Missouri Infantry, da kuma batirin bindigogi na Henry Guibor, sun haye kogin Mississippi zuwa Louisiana don lura da ƙungiyoyin Union. Ranar 15 ga watan Afrilu, an umurci Missourians su koma Grand Gulf, kuma rundunar ta shiga cikin wuta tare da jiragen ruwa na Union a bakin teku.
Yaƙin Grand Gulf. Bayan da Babban Janar na Union Ulysses S. Grant ya sauka a Mississippi don matsawa kan Vicksburg, Bowen ya aika da mutane da yawa daga Grand Gulf zuwa Port Gibson, Mississippi don kokarin dakatar da Grant. Duk da haka, 1st da 4th Missouri (Consolidated) sun kasance a kan aikin da aka keɓe da ke kula da gada, kuma sun rasa yakin Port Gibson a ranar 1 ga Mayu.