<prompt> Qedela umusho olandelayo: Ngemva kokuhlelwa kabusha okukhulu ebusika buka-18631864, uWalker ne-Army of the Potomac balwa ne-Overland Campaign ngoMeyi nangoJuni 1864. Impi yaseCold Harbor ekuqaleni kukaJuni yathatha inani elikhulu emaqenjini e-II Corps kanti uWalker walimala edolweni ngesikhathi sempi. Emkhankasweni weRichmond-Petersburg owalandela, uWalker wamiswa njengekholonili. Nokho, ngo-August 25, 1864, njengoba wagibela ukuze athole uMajor General uJohn Gibbon ngaphambili ngesikhathi  <response>: E-Second Battle of Reams Station, uWalker wavinjezelwa futhi wathunjwa yi-11th Georgia Infantry. Ngo-Agasti 27, uWalker wakwazi ukuphunyuka emgqeni weziboshwa ezihamba nomunye isiboshwa kodwa waphinde wabanjwa yi-51st North Carolina Infantry ngemuva kokuzama ukubhukuda ngaphesheya koMfula i-Appomattox futhi wacishe waminza. Ngemva kokuboshwa ePetersburg, wadluliselwa ejele elidume kabi laseLibby eRichmond, lapho kwakuboshwe khona nomfowabo omdala. Ngo-Okthoba 1864, uWalker wakhululwa kanye nezinye iziboshwa ezingamashumi amathathu njengengxenye yokushintshana. 