 Ramba uchinyora ndima iyi - Pakutanga kweHondo Yenyika yeAmerica muna 1861, Cockrell akabatana neMissouri State Guard saKaputeni. Mushure mekunge aunganidzwa muConfederate States Army mu2nd Missouri Regiment kutanga kwa1862 iyo yakaumbwa se1st, asi yakaverengerwa sezvo Bowen akange atoumba regiment; kukwidziridzwa kuita colonel. Cockrell akarayira boka revarwi muVicksburg Campaign. Akazvizivisa paHondo yeChampion Hill, achitanga kurwisa kwakadzinga kwenguva pfupi mauto eXVII Corps kubva pachikomo. Akatorawo rutivi muHondo yeBig Black River Bridge. Boka rake rakakwanisa kutiza mauto ehurumende asati apamba zambuko racho. Akakuvadzwa muruoko negomba rakaputika panguva yeKukombwa kweVicksburg. 