Argonians invaded Morrowind. Not sure if it went the other way around first. But i doubt it
They could easily make that work.
oh right! i must have got it mixed up then... i swear i heard something about blackmarsh being poisonous etc in oblivion somewhere, i just can't remember but it ticked me off a little.
about morrowind...in the game, i looked on the map and noticed that it takes place on the island where the red mountain is... however there is more parts of morrowind off this island surrounding it... was this due to hard ware capabilities back then? or am i wrong and you CAN go off that island on morrowind and into the mainland?