Rubuta ci gaba ga wannan sakin layi - Ya shafe yawancin yakin a kan wasu alƙawura na ma'aikata, kuma ya auri Victoire Marion Williams-Freeman a 1942. An ba shi mukamin Laftanar Kanal, an nada shi a matsayin Kwamandan Kwamandan (CO) na 1st Battalion, Manchester Regiment, a watan Maris na 1944. Bataliya (a baya bataliya ta 6, rundunar sojojin kasa kafin a sake sanya ta a matsayin bataliya ta 1 a watan Mayu na shekarar 1942), tana aiki a matsayin bataliya mai dauke da bindigogi na 53rd (Welsh) Infantry Division, wani rukunin farko na TA wanda Manjo Janar Robert Ross ya ba da umarni, ba shi da horo sosai kuma kusan bai dace da aiki ba, amma Harington da sauri ya kawo shi cikin cikakken shiri. Battalion, tare da rukunin mahaifiyarsa, sun sauka a Normandy, Faransa, a ƙarshen Yuni, makonni uku bayan saukowar Normandy, kuma sun shiga cikin mummunan fada a duk lokacin yakin Normandy, kuma mafi yawan fadace-fadace a Yammacin Turai
, har sai Harington ya yi watsi da umurnin a tsakiyar watan Satumbar 1944, lokacin da ya zama Babban Jami'in Janar na Grade 1 (GSO1) tare da HQ na 53rd Division. Ya ci gaba da wannan mukamin har zuwa Mayu 1945. Domin ayyukansa a matsayin CO na 1st Manchesters, Harington ya ba da lambar yabo ta DSO a farkon 1945.