Well, there were attempts, but they were extremely half-assed attempts. Often, the militia that made up the bulk of the U.S. army at that time would refuse to

Well, there were attempts, but they were extremely half-assed attempts. Often, the militia that made up the bulk of the U.S. army at that time would refuse to cross outside their state lines, which aborted several planned campaigns to attack into upper and lower Canada. The whole affair isn't much more than a weird side-show of the Napoleonic wars, although you'd never know that from the way it is presented in most U.S. history textbooks.