Since this is a thing for post-1900 cliches, I thought I would have my personal stab at some cliches in pre-1800 TLs. - An America TL where the UK ends up as an analogue to Nazi Germany. (Hell, one of the reasons I want my own US TL is to avert that.) - The Mexican-American War has the US gain even more territory than it did IOTL. Any additional cliches you have noticed are welcome.