Kammala jumla mai zuwa: A ranar 1 ga Yuli, 1863, Walker ya ci gaba da zama brigadier general kuma bayan yakin Gettysburg an sanya shi ga Major General Henry Heth's division na III Corps na Army of Northern Virginia, da farko ya umurci tsohon brigade na Heth, sa'an nan kuma Brigadier Janar James J. Archer's brigade, bayan da Archer ya ji rauni sosai. Walker ya yi aiki a matsayin kwamandan brigade a karkashin Heth har sai ya rasa ƙafafunsa na hagu a yakin Spotsylvania Court House a ranar 10 ga Mayu, 1864. Ya shiga cikin yakin Bristoe Station a ranar 14 ga Oktoba, 1863, a cikin
Yaƙin Mine Run kuma, bayan ya yi aiki a kwarin Shenandoah a lokacin hunturu na 1864 <unk> 1864, a Yaƙin daji kafin raunin da ya yi a Spotsylvania Court House.