<prompt> Qedela umusho olandelayo: Ekuqhumeni kweMpi Yombango u-Osterhaus wabekwa njengomphathi we-2nd Missouri Volunteer Infantry futhi ngonyaka wokuqala wempi wasebenza eMissouri nase-Arkansas, lapho athatha khona ingxenye ebonakalayo eMpini yaseWilsons Creek naseMpini yasePea Ridge. EPea Ridge wayala amabutho aqala ukuxhumana namabutho ase-Confederate ayeqhubekela phambili ngakwesobunxele se-Union. Wakhushulwa waba yi-brigadier general ngoJuni 9, 1862. Ngo-1863 wayala isigaba e  <response>: Impi yasePort Gibson, lapho akhombisa khona ikhono lokuqhudelana ekutholeni abavikeli be-Confederate ngaphandle kwesikhundla esihle. 