3rd anglo-american war

what would of happened if in the 19th century the Oregon boundary dispute between the US & UK would have turned into war?
at that time who would have won?
if the US had won what territory would they have taken?
if the UK had won what territory would they have taken?
would there still have been a mexican-american war after fighting the british?

if yall have answers give them to me please thanks
 
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