I'll take the UK. I then proceed to break the empire up into the following countries: Mercia, Northumbria, Jorvik, Cornwall, Wessex, Kent, Scotland, the Isles, Connacht, Desmond, Meath, Ulster, Leinster, <each individual Canadian province, Australian province, NZ island, Pacific island, and African country here>
Also I declare that Poland is on Mars.
Have at it!