This campaign or theatre battle honour was awarded for active service on the western front.  The battle honour covers all actions conducted in France and Belgium during the Great War.
This map  from We Stand on Guard by J. Martinson shows the
locations in France and Belgium were the Canadian C.E.F.,
including the 15th Bn C.E.F. was engaged during the Great War 
15th Bn coming out of the line
near Ploegsteert Belgium 1916
‘Vimy Cross” erected following
9 April 1917 assault on Vimy Ridge
to memorialize 15th Bn casualties
 of the engagement.