Kammala jumla mai zuwa: Daga Maris 1941 Barber ya koma Janar Janar a matsayin GSO1, har sai ya dauki umurnin, a watan Oktoba, na 46th (Highland) Infantry Brigade, ya jagoranci ta ta hanyar yakin Normandy a lokacin rani na 1944. Daga 3 ga watan Agusta 1944 Barber, lokacin da aka daukaka shi zuwa babban janar mai aiki, ya umurci sashen 15th (Scottish) Infantry Division har zuwa karshen yakin.
kamfen a arewa maso yammacin Turai. A cikin wannan yakin, 15th Division ya bambanta ya jagoranci manyan koguna uku na Seine, Rhine da Elbe kuma an ba Barber lambar yabo ga DSO.