A shekara mai zuwa, Hawley ya umurci brigade a karkashin Janar Truman Seymour a yakin Olustee a Florida. An sake tura shi da mutanensa zuwa layin gaba a Virginia a matsayin wani ɓangare na Terry's Division, X Corps, Army of the James. Ya kasance a cikin fadace-fadace na
Drewry's Bluff, Deep Run, Derbytown Road, da kuma sauran ayyukan kusa da Bermuda Hundred da Deep Bottom. Tare da budewa da aka yi ta hanyar hasara da sake sakewa, Hawley ya jagoranci wani rukuni a lokacin Siege na Petersburg kuma an ci gaba da shi a watan Satumba na 1864 zuwa brigadier janar na masu sa kai. Damuwa game da kiyaye zaman lafiya a lokacin zaben Nuwamba, Hawley ya umurci rundunar da aka zaba a New York City don kare tsarin zaben.