My Grandfather was in the Royal Canadian Horse Artillery . He was gassed at the Somme and sent to England to recover. (And met my grandmother). After he recovered from the gas he had the chance to volunteer to go to Russia and fight against the Bolsheviks , and because of that , his war wasn’t over until the summer of 1919. 16th Brigade. Canadian Field Artillery
I once asked my mother why he volunteered to go to Russia. She said he had told her, Nothing could be as bad as France.
Thanks for that, the campaign against the Bolsheveks is one of the more forgotten chapters of history.