A British New York and Pennsylvania after independence

What if Britain retained New York and Pennsylvania after the American Revolution?

Holding the northern colonies would probably produce a much larger, richer Canada and a smaller United States, reshaping westward expansion, the War of 1812, Alaska, slavery, and the industrial balance of later wars.

In the panel's scenario, British retention of New York and Pennsylvania would probably pull neighboring northern colonies into the same political settlement. New York would separate New England from the independent southern colonies, while the two retained colonies supplied ports and access to the interior. The resulting British North America could have a larger population and resource base, changing both westward settlement and the balance in the War of 1812. Later suggestions concerning Alaska, Native alliances, slavery, and industrial resources remain conditional extensions of this alternate history. A geographically divided United States with a British enclave in its middle is considered a less stable arrangement.