Officially, Canada was not involved in the Viet Nam War.
However, Canadians formed the largest foreign contingent within the United States military during our "police action" in 'Nam.

The Canadian government states officially that no more than 5,000 troops served in Viet Nam.
The Pentagon estimates that between 2,500-3,000 Canadians served.
Private groups who meet regularly to commemorate their service, estimate that 10,000+ served in some capacity or another.
At any rate, during this turbulent era in America's history, Canadian industry supplied $2.47 BILLION worth of war materials between 1968-1973.
Canada WAS indeed part of the Viet Nam conflict.
These facts do not fit the Mainstream Media's template, therefore, they must be distorted.
But facts are facts, and cannot be hidden forever.