Pari gbolohun ti o tẹle: Ni Oṣu Keje 1, 1863, Walker ni igbega si brigadier general ati lẹhin igbimọ Gettysburg ni a yàn si Major General Henry Heth's division of III Corps of the Army of Northern Virginia, ni ibẹrẹ ti o nṣakoso ẹgbẹ iṣaaju ti Heth, lẹhinna Brigadier General James J. Archer's brigade bakanna, lẹhin ti Archer ṣe ipalara nla. Walker sìn gẹ́gẹ́ bí olórí ẹgbẹ́ ológun lábẹ́ Heth títí ó fi pàdánù ẹsẹ̀ òsì rẹ̀ nínú Ogun Spotsylvania Court House ní May 10, 1864. Ó kópa nínú Ogun Bristoe Station ní ọjọ́ kẹrìnlá oṣù kẹwàá, ọdún 1863, ní ìpele
Ogun ti Mine Run ati, lẹhin ti o ṣiṣẹ ni afonifoji Shenandoah lakoko igba otutu ti 1864 <unk> 1864, ni Ogun ti Wilderness ṣaaju ki o to farapa ni Ile-ẹjọ Spotsylvania.