Its been 200 years since the Oblivion crisis but the civil war in Skyrim is all we know.
ALOT could have changed in 200 years!
I mean:
Have the Akaviri tried to invade again?
Is Orinsinium now a fully fledged province?
What happened to all those daedra worshippers in Summerset isle?
Did the Nerreverine return from Akavir?
How good a leader was chancellor Occato?
Are there better relations/communications with Atmora and (Dam forgot name of Redguard homeland)
So... much... questions!
Post the questions/developments you have or think might have happened!

I wonder what happened to the Mede-empire.

Orinsinium isnt yet a full province.
Its simply a part of high rock.
Even though it apparently sunk, Some NPCs mention sailing there (i think in Anvil)

Hmm, that must mean that Sentinel and Wayrest are also apart of High Rock, It wouldn't surprise me if the orcs took advantage of the Empires weakness to found an empire

EDIT: I believe they meant sailing to where the country was, not actually making landfall

But why would they just sail to no where? thats what had me confused!

stuff happens, we don′t need to care about them, unless they happened within the borders of Skyrim.

Looting the ruins, there would be lots of relics, there aren't any countries on Nirn that trade with Tamriel, because they either can't or won't so I don't see any other reason, unless a smal piece of the continent hasn't sunk yet, a tiny tavern on it, like a pirates meeting place, away from the Tamrielic navy to pick up contracts and other piratey stuff

Or maybe to honour the memory of their homeland?