The success of his mission to clear a path for the 4th Canadian (Armoured) Division and sow disorganization among the enemy was due to his "brilliant military leadership and cool calculating courage" and a "single act of bravery" which "drove the enemy from a strongly held key village thereby breaking the crust of the enemy defences in the whole of this sector." However, in a standard practice of the time, the award was downgraded to a lesser award, and Mayne instead received a third bar to the DSO (in other words, a fourth award of the DSO).