On Sunday, a group of 250 Iranian legislators introduced a motion that requires the administration to designate the Canadian Army and federal police forces as terrorist organizations.
Historically speaking, from an indigenous perspective, the characterization of the RCMP as terrorist is not too far off the mark.
Lots of good articles on Canadian brutality in WW1 if you do a search. As for war crimes in particular, here's one of many articles mentioning how Canadians killed prisoners of war: