Mezue ahịrịokwu na-esonụ: Na July 1, 1863, Walker e buliri ya n'ọkwa brigadier general na mgbe Gettysburg mkpọsa e kenyere Major General Henry Heth nke nkewa nke III Corps nke Army nke Northern Virginia, na mbụ na-achịkwa Heth mbụ brigade, mgbe ahụ Brigadier General James J. Archer si brigade dị ka nke ọma, mgbe Archer merụrụ ahụ nke ukwuu. Walker jere ozi dị ka onye ọchịagha nke ndị agha n'okpuru Heth ruo mgbe ọ tụfuru ụkwụ aka ekpe ya n'agha nke Spotsylvania Court House na Mee 10, 1864. O sonyere n'agha nke Bristoe Station n'abalị iri na anọ n'ọnwa Ọktoba n'afọ 1863, na
Agha nke Mine Run na, mgbe ọ rụsịrị ọrụ na ndagwurugwu Shenandoah n'oge oyi nke 1864-1864, na Agha nke Ọzara tupu mmerụ ahụ ya na Spotsylvania Court House.