Let's say that the War of 1812 still occurs in a timeline where the US contains OTL Canada/Nova Scotia, while the United Kingdom kept Rupert's Land. Without a Canadian theater, how much investment would the British make in invading from the Hudson Bay into this version of the US? Would this be mostly naval? Would there still be battles on the Great Lakes?
As a second scenario, let's assume the British have held Cuba as a British colony since the 1740s' War of Jenkins' Ear. Is there a realistic way the Americans could've captured the island militarily? I'm not thinking so.