At the start of Code Geass Japan has just been conquered by Britannia and renamed Area 11. After Prince Clovis's death we are introduced to Princess Cornelia, learning that her Knights had just established another Area for the Empire (I do not remember the number) before leaving to take Clovis's place in Area 11.
I am wondering what each of the Areas are (ie. Area 11 is Japan), if they were conquered in the order they are numbered and if they were all also conquered while Charles Zi Britannia was Emperor.