I refer to two Hansard transcripts from 1997 to illustrate the reasoning (of politicians) that led to the CPSM (the CVSMK had similar original justification) being developed. We received UN medals and they were accepted into the Canadian honours system. However, much like the notion that the campaign stars and service medals of WW2 were "British" (the CVSM was Canada's recognition for WW2 service), likewise the Korea Medal (though the Canadian version was inscribed "CANADA") and the UN Service Medal weren't Canadian so the first push was the CVSMK in 1991.
From Hansard in 1991.
House of Commons Debates, 34th Parliament, 3rd Session : Vol. 7
parl.canadiana.ca
View attachment 89717
And the 1997 Hansards.
Debates (Hansard) No. 58 - June 10, 1996 (35-2) - House of Commons of Canada
www.ourcommons.ca
Debates (Hansard) No. 121 - February 3, 1997 (35-2) - House of Commons of Canada
www.ourcommons.ca
For years we received the UN medals (later with numerals for additional tours) and they were accepted as part of the Canadian honours system but there's always be someone who'll eventually pick the flyshit out of pepper as to the origin of the recognition.
These threads always remind me that I should have my CPSM added to my medals rack.