Nyorera kuenderera kweiyi ndima - Musi waChikunguru 1, 1863, Walker akasimudzirwa kuita brigadier general uye mushure meGettysburg mushandirapamwe akapihwa Major General Henry Heth's chikamu cheIII Corps yeNorthern Virginia Army, pakutanga achiraira Heth's yaimbova brigade, ipapo Brigadier General James J. Archer's brigade futi, mushure mekukuvara kwakakomba kwaArcher. Walker akashanda semutungamiri webrigade pasi peHeth kusvikira arasikirwa nerutsoka rwake rworuboshwe muHondo yeSpotsylvania Court House musi waMay 10, 1864. Akatora rutivi muHondo yeBristoe Station pana October 14, 1863, muHondo yeMine Run
uye, pashure pokushumira muMupata weShenandoah munguva yechando ya1864<unk>1864, muHondo yeWilderness asati akuvadzwa paSpotsylvania Court House.