<prompt> Bhala okuqhubekayo kwalesi sigaba - UGilbert wajoyina ibutho lamavolontiya kamuva kunabaningi besikhathi sakhe, wabhalisa ngo-October 1862. Noma kunjalo, wamiswa njengekholonili ye-27th Iowa Volunteer Infantry Regiment ngo-October 3, 1862. Ibutho likaGilbert lahlanganyela e-Little Rock Expedition kaFrederick Steele  <response>: kodwa akazange ahileleke kunoma iyiphi impi. Wathunyelwa e-Arkansas futhi wabe esedluliselwa eMississippi lapho i-regiment yakhe yayihlanganiswe khona ne-Andrew J. Smiths division e-XVI Corps ngesikhathi se-Meridian Expedition. 