Mercifully, the authors approach this a bit tongue in cheek.
Of course, the real story should be that Canada considered a pre-emptive invasion of America in case of a crisis:
Canadian military strategists developed a plan to invade the United States in 1921 -- nine years before their American counterparts created War Plan Red.
The Canadian plan was developed by the country's director of military operations and intelligence, a World War I hero named James Sutherland "Buster" Brown. Apparently Buster believed that the best defense was a good offense: His "Defence Scheme No. 1" called for Canadian soldiers to invade the United States, charging toward Albany, Minneapolis, Seattle and Great Falls, Mont., at the first signs of a possible U.S. invasion.
"His plan was to start sending people south quickly because surprise would be more important than preparation," said Floyd Rudmin, a Canadian psychology professor and author of "Bordering on Aggression: Evidence of U.S. Military Preparations Against Canada," a 1993 book about both nations' war plans. "At a certain point, he figured they'd be stopped and then retreat, blowing up bridges and tearing up railroad tracks to slow the Americans down."
Brown's idea was to buy time for the British to come to Canada's rescue.
I will be highly disappointed if the humorless Left doesn't seize on this story to bash America. Actually, I think it would make a wonderful exercise for staff officers in training to plan exactly how we would invade and occupy Canada. Not because I think that we might need to, but just because Canada is so large and our military is not exactly deployed to invade. It is an odd enough scenario that it would be an interesting read.
Though I must say I'd be willing to be a human shield available to camp out at Canadian breweries, hockey stadiums, swingers clubs, and Tim Horton outlets to ward off the American invasion.
But given that Canada planned to invade us (and did host invasions in our Revolution and the War of 1812, remember), perhaps Canadian shields should come south. Remember, as was noted in the cited movie "Canadian Bacon," isn't it a little suspicious that 90% of Canada's population is forward deployed and massed within 100 miles of our border?