Rubuta ci gaba don wannan sakin layi - A lokacin yakin duniya na biyu, Coleman ya umurci Battalion na 4, Welch Regiment daga 1941 zuwa 1944 kuma ya zama kwamandan kwamandan na 160th Infantry Brigade, mahaifiyar kungiyarsa, a karshen 1943, kafin Brigadier Lashmer Whistler ya isa Janairu 1944 don ya dauki umurnin, tare da Coleman ya koma umurnin 4th Welch. A watan Yunin 1944 Coleman ya gaji Whistler a matsayin kwamandan brigade, yana jagorantar ta a duk lokacin yakin da ake yi a Arewa maso Yammacin Turai
daga Normandy kusan zuwa iyakar Denmark ta hanyar Falaise, Antwerp, Nijmegen,'s-Hertogenbosch, Wessem, Ardennes, Reichswald, Rhine, Weser, da kuma Hamburg. An ba shi lambar yabo ta Distinguished Service Order (DSO) a shekarar 1945 da kuma Dutch Knight 4th Class na Sojan Sojan William a shekarar 1947. Kamar yadda mai kula da rundunarsa ya rubuta bayan mutuwarsa, girmamawa da mazajen rundunar suke masa "mai yiwuwa ya ba shi farin ciki da gamsuwa kamar kowane nasarorin da ya samu daga baya". Tabbas ya rubuta da farin ciki game da nasarorin da rundunar ta 53 (Welsh) ta samu, wanda brigade dinsa ya kasance wani bangare, a cikin gabatarwar sa ga tarihin rawar da ta taka a Yaƙin Duniya na Biyu, wanda aka buga a 1955, kuma kamar yadda marubucinsa ya bayyana, ya ba da gudummawa mai yawa ga wannan asusun.