With-in years The Empire starts to collapse and Black Marsh followed by Elsweyr Break off, shortly after Titus Mead takes control by taking the imperial city with less than 1000 men and crowns himself Emperor. With Black Marsh Breaking off from Imperial governing they Invade Morrowind: "With the absence of Vivec, the Ministry of Truth becomes unstable. Vuhon creates an Ingenium in order to keep the rock stable by using first dozens of dying souls, then a small number of living ones as fuel. Sul fights Vuhon over his wife, who was being used as a living battery causing the Ministry of Truth to crash into Vvardenfell, destroying much of the island and killing many of the people. The Argonians of Black Marsh invade and conquer the crippled Dunmer." Then the Dunmer retreat to Solstheim.
A few other things happen and this might not be official lore but its made it onto the Time line. What do you guys think?