Whakaotihia te rerenga e whai ake nei: I pau i a ia te nuinga o te pakanga i runga i nga momo tuunga kaimahi, ka marena ki a Victoire Marion Williams-Freeman i te 1942. I whakatairangahia ia ki te koronel, i tohua ia hei Kaiwhakahaere Whakahaere (CO) o te 1st Battalion, Manchester Regiment, i te Poutu-te-rangi 1944. Ko te roopu (i mua ko te 6th Battalion, he Army Territorial i mua i te whakaingoa ano ki te 1st Battalion i te marama o Mei o te tau 1942), e mahi ana hei roopu pupuhi miihini o te 53rd (Welsh) Infantry Division, he roopu TA raina tuatahi i whakahaua e te Major General Robert Ross, he iti te whakangungu me te kore e pai mo te mahi, engari i tere te kawe mai a Harington ki te whakarite whawhai. Ko te roopu, me tana wehenga matua, i tae ki Normandy, France, i te mutunga o Pipiri, e toru wiki i muri i nga whakaekenga o Normandy, a i uru ki nga pakanga pakari puta noa i te Pakanga o Normandy, me te nuinga o nga pakanga i muri mai.
I whawhai i Uropi ki te Hauauru, tae noa ki te wehenga atu o Harington i te waenganui o Hepetema 1944, i te wa i riro ai ia hei Kaiwhakahaere Matua Tuatahi (GSO1) me te 53rd Division HQ. I mau tonu ia i tenei pou tae noa ki Mei 1945. Mo ana mahi hei CO o te 1st Manchesters, i whakawhiwhia a Harington ki te Distinguished Service Order DSO i te timatanga o te 1945.