Rubuta ci gaba don wannan sakin layi - Babban Yaƙin ya fara ne a watan Agusta 1914 kuma Montgomery ya koma Faransa tare da batalayinsa a wannan watan, wanda a lokacin yana cikin Brigade na 10 na Division na 4. Ya ga aikin a yakin Le Cateau
wannan watan da kuma lokacin da suka janye daga Mons. A Méteren, kusa da kan iyakar Belgium a Bailleul a ranar 13 ga Oktoba, 1914, a lokacin da Allied counter-offensive, an harbe shi a cikin huhu na dama ta hanyar mai harbi. Montgomery ya sake samun rauni a gwiwa. An ba shi lambar yabo ta Musamman don jagorancin shugabanci: ambaton wannan lambar yabo, wanda aka buga a cikin "London Gazette" a watan Disamba na 1914 ya karanta: "Babban ƙarfin hali ya jagoranci a ranar 13 ga Oktoba, lokacin da ya juya abokan gaba daga cikin ramin da bayonet. Ya ji rauni ƙwarai".