Specifically, with a POD as early as you want, here is my challenge. Have 5 or fewer countries in all of Europe by 2000 A.D. This includes the British Isles, and Scandinavia. Yes, I realize this is rather unlikely, however I'm giving you a VERY long time to accomplish it in. Unlike in Post 1900 history, we can go back to when states aren't fully established. Hopefully, you can make it where things stabilize to where there are 5 countries or less in all of Europe.
Also, yes, a basic TL would be appreciated if possible. I'm seeing how plausible this is for a setting I'm thinking of right now, so that would be very helpful.