I'm thinking of hitting up the north-south divide in the US and instead of the u.s. annexing Texas and expanding the southern states power they decide to go after The Oregon Territory and expand the north wall containing the South. Causing a civil war to start around 1846 or so with the southern states seceding refusing to fight a Yankees War.Yeah, the dogs are just snarling to attack any TL that pushes the envelope.
What kind of ideas do you have?