Here ya go ;
During the years 1954 to 1975 Canada served on 2 international truce commissions and provided medical supplies and technical assistance. Canadian diplomats were involved in negotiations between Washington and Hanoi and successive Canadian governments, both Liberal and Conservative, maintained that Ottawa was an impartial and objective peacekeeper, an innocent and helpful bystander negotiating for peace and administering aid to victims of the war. However, Cabinet papers, confidential stenographic minutes of the truce commissions as well as top-secret American government cables revealed Canada to be a willing ally of US counterinsurgency efforts.
Canada's record on the truce commissions was a partisan one, rooted in the presumption of Hanoi's guilt and Saigon's innocence and designed to discredit North Vietnam while exonerating South Vietnam from its obligations to uphold the Geneva Agreements. Canadian delegates engaged in espionage for the US Central Intelligence Agency and aided the covert introduction of American arms and personnel into South Vietnam while they spotted for US bombers over North Vietnam. Canadian commissioners shielded the US chemical defoliant program from public inquiry, parlayed American threats of expanded war to Hanoi, and penned the reports legitimating both the rupture of the Geneva Agreements and the US air war over North Vietnam. Ottawa would later assert that these actions were necessary to counter-balance the activities of the Eastern bloc countries with whom they shared membership on the truce commissions.
Links =
http://www.geocities.com/Athens/Rhodes/1588/
http://dede.essortment.com/canadasvietnam_rgwv.htm