Asked by Ashley

There was a threat of American expansion into British North America. Where were the concern of the Americans expanding too? Why would this area be a prime target?
Answered by Ms. Sue
The Americans wanted to expand in Canada's southwest. The rallying cry was "54-40 or Fight!" This is the latitude that is far north of the present 49 degree boundary.

http://en.wikipedia.org/wiki/Oregon_boundary_dispute
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