The article is worth reading in its entirety. Here are some of its morsels:
Going North, Heading South
In 1866, about 800 Irish Americans in the Fenian Brotherhood decided to strike a blow for Irish independence by invading Canada. They crossed the Niagara River into Ontario, where they defeated a Canadian militia. But when British troops approached, the Fenians fled back to the United States, where many were arrested.
After that, Americans stopped invading Canada and took up other hobbies, such as invading Mexico, Haiti, Nicaragua, Grenada and, of course, Iraq.
But the dream of invading Canada lives on in the American psyche, occasionally manifesting itself in bizarre ways. Movies, for instance.
In the 1995 movie "Canadian Bacon," the U.S. president, played by Alan Alda, decides to jump-start the economy by picking a fight with Canada. His battle cry: "Surrender pronto or we'll level Toronto."
In the 1999 movie "South Park: Bigger, Longer & Uncut," Americans, angered that their kids have been corrupted by a pair of foulmouthed, flatulent Canadian comedians, go to war. Canada responds by sending its air force to bomb the Hollywood home of the Baldwin brothers -- a far more popular defensive strategy than anything Buster Brown devised. Moviegoers left theaters humming the film's theme:
Blame Canada! Blame Canada!
http://www.washingtonpost.com/wp-dyn/content/article/2005/12/29/AR2005122901412_pf.html