The actual number was 10,000 Canadian's fought in the Vietnam war, many of them were former members of the Canadian forces, some were ex-pats who had moved to the states earlier, some basically left Canada and joined the U.S. Military for the reason that they supported the war in Vietnam, so I can actually see where Coulter might have become confused.
Some other things to realize about Canada and the Vietnam war
- Canada was the largest ammunition supplier to the U.S. action in Vietnam, supplying everything from boots, to small arms ammo, to bombs
- Canada manufactured and supplied agent orange and Napalm to the U.S. military specifically for use by the U.S. Military in Vietnam.
- Canadian delegates to the UN truce Commission were actively spying on the North Vietnam gov't
So while Ann Coulter might not have done her homework, or thought things through, it would be easy to see why she reached the conclusion that she did.
Canada in Nam
And it was never in equal numbers, but for every 3 American's that fled to Canada, 1 Canadian went to Vietnam. thats actually a pretty stunning figure considering the population differences between the countries.