Na auai Rohm ma lana regiment i le Kilpatrick's Raid i Richmond mai ia Fepuari 28 e oʻo ia Mati 4, 1864, na faaauau pea ona fesoasoani e valaau ma faʻatonutonu ana paʻaga 16th Pennsylvania Cavalry i le taua o le taʻitaʻi pu mo lana regiment i le taimi o le Taua o le vao (Me 5<unk>8) o se vaega o le Union Lt. General Ulysses S. Grant's Overland Campaign, ma i le taimi o le Major-General Philip H. Sheridan's osofaʻiga i le vaitafe o James (Me 9<unk>14), e aofia ai taua o Yellow Tavern (Me 11) ma Totopotomoy Creek
(Me 2 <unk>31). Na faaauau pea ona tau ma lana regiment i le taimi o le Grant's Overland Campaign i le Taua o le Faleoloa a Haw (Me 28), na valaauina foi e Rohm le 16th Pennsylvania e tau i Cold Harbor (Me 31 <unk> Iuni 1), Trevilian Station (Iuni 11 <unk> 12) ma le Ekalesia a Saint Mary (Iuni 24).