ShepherdsDog ShepherdsDog:
The Prussians were nasty.....the Saxon regiments really didn't want to do too much. During the first war, the Saxon regiments often balked at firing on the the English, and asked why should one Saxon kill another.
here's that vulpine grin Thanos mentioned

... and the Prussians (and Bavarians) followed the Canadians up and down the line in Flanders for most of the war, the Germans were so concerned about the Canadians.