my understanding was always that you could cross INTO canada with a regular us driver's license, but couldn't RETURN except with an edl. but i may have been misinformed.
"Napoleon attacked by rabbits" so I had to go google search it. "The story of Napoleon being "defeated" by rabbits during a hunt in 1807 is a humorous anecdote, but it's not a confirmed historical fact, though it is mentioned in General Thiébault's memoirs. "