Ya horar da sashen a Ingila na watanni 21 masu zuwa, ya jagoranci shi tare da babban nasara a lokacin Operation Overlord, sunan lambar don mamayewar Allied na Normandy, a lokacin rani na 1944. Rukunin sa na 53 ya sha wahala sosai a cikin Yaƙin Caen da yaƙe-yaƙe da suka biyo baya, amma a ƙarshen yaƙin neman zaɓe a Normandy ya kama wasu sojojin Jamus 3,500 a matsayin fursunonin yaƙi (POWs). Daga bisani, bayan yakin Falaise (inda Kyaftin Tasker Watkins na 1/5th Battalion, Welch Regiment ya ba da lambar yabo ta Victoria Cross kawai na yaki), ya shiga cikin bin sojojin Jamus da ke janyewa a lokacin yakin basasa.
Allied ci gaba daga Paris zuwa Rhine, shiga Netherlands da kuma wasa a gwada qananan rawa a Operation Market Garden, kamawa da garin's-Hertogenbosch, daga baya kasancewa daya daga cikin 'yan Birtaniya rarrabuwa a taka rawa a cikin Battle na Bulge. A watan Fabrairun 1945 rundunar ta taka muhimmiyar rawa a cikin Operation Veritable (Battle of the Reichswald), daga baya ta tsallaka Kogin Rhine a watan Maris kuma ta shiga cikin mamayewar Yammacin Allied na Jamus, wanda a karshe ya kawo karshen yakin a Hamburg a watan Mayu. Ya ci gaba da jagorantar rukunin a cikin mamayar Allied na Jamus. An sanya Ross a matsayin Abokin Tsarin Bath (CB) a ranar 1 ga Fabrairu, 1945.