Kammala jumla mai zuwa: Lokacin da aka soke III Corps, an canja batirin Clark zuwa Artillery Reserve a cikin brigade na Major John A. Tompkins. A cikin wannan tsari, batirin Clark ya yi aiki a farkon yakin da aka yi a kan yakin basasa. A lokacin yakin Cold Harbor, an canja batirin Clark zuwa rundunar bindigogi na II Corps karkashin Colonel John C. Tidball. A cikin Siege na Petersburg, batirin Clark ya kasance a cikin II Corps a karkashin Tidball sannan kuma a karkashin Colonel John G. Hazard. Clark ya ji rauni kadan a
Yaƙin na biyu na tashar Ream a 1864. Daga bisani ya bi sojojin a cikin batirinsa wanda ya yi rajista ya ƙare zuwa Trenton, New Jersey, kafin ya koma gaban Petersburg. A baya a Petersburg, Clark ya kasance mai kula da bindigogi a kan gaba na II Corps a watan Disamba na 1864.