User blog comment:ShawnCognitionCP/The Empire vs Stormcloaks, the most likely answer/@comment-24728100-20140613040954/@comment-24728100-20140613215241

Your map shows hammerfell is seprarte from the empire, so this is after the Great War, important thing to note, Elsweyr is no longer a nation as the confederacy has split into two opposing nations, both of which are tributaries to the dominion, but not part of it... in the Same way Cyrodiil is now a tributary to the dominion and has accepted the influence of the thalmor but is not considered a part of the dominion... yet

Interesting, even if Elsweyr (the two nations, it's just easier to call them that -'J) were a member of the dominion the total area would fit within the bounds of Cyrodiil -'J