alternatehistory.com

Just like the title. Your challenge is to have all British interests in Canada abandoned by the beginning of the American Civil War. This could be done via sterling successes in the American Revolution, the War of 1812, or possibly a third conflict if you can create these circumstances. Keep in mind this will likely change the date the American Civil War begins, the circumstances, and possibly even the nature of that war in general. The butterflies here outnumber the soldiers on both sides combined in each conflict. Do your best, or worst, depending.
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