I have a variety of questions regarding Black Marsh / Argonians during the 4E.
So, if I'm not mistaken, I understand that after the Red Volcano erupted, the Argonians invaded southern Morrowind - but what happened after, specifically? After the invasion, did a large handful of Argonians establish themselves inside of southern Morrowind itself? Or did the invading Argonians simply ransack southern Morrowind and return to Black Marsh?
IIRC, the Argonians only annexed disputed territory in southern Morrowind. As for the rest of Morrowind, they basically made no effort to rule, rebuild or colonize. They came in, ransacked the place, murdered a lot of Dunmer, and proceeded to occupy most of Morrowind south of Red Mountain in terms of latitude.
Also, how was Black Marsh affected by the events of Umbriel? Was Black Marsh simply decimated due the floating island? And if so, what of Black Marsh now? Or did Umbriel not harm Black Marsh as much as we thought? Although if Black Marsh was in fact somewhat destroyed by Umbriel, why wouldn't the Aldmeri Dominion take advantage of the situation and invade Black Marsh?
The only part of Black Marsh that suffered heavily because of Umbriel was Lilmoth, the home of the An-Xileel who are presently the ruling faction in Black Marsh. The Aldmeri Dominion did in fact help provoke the Argonians into leaving the Empire, but the Thalmor quickly lost control and influence, turning Black Marsh into the closest thing in Tamriel that could be considered a "rogue state".
I feel as though the events of Umbriel are totally lost throughout Skyrim - not even a single book. Nor do any Argonians throughout the land of Skyrim mention the state of their homeland. I know many situations and events are simply not answered - but if not explained, what do you think are the most justifiable conclusions - what of Black Marsh now?
To be fair, Umbriel was roughly 160 years prior to the events of Skyrim. Far more historically and culturally significant events occured since then. We also have to consider that the places Umbriel affected the most (Morrowind and Black Marsh) are either destroyed (Morrowind) or shrouded in mystery (Black Marsh).
As for a best guess as to current affairs in Black Marsh, the An-Xileel are likely still in charge but will have been weakened and are likely being challenged for power in the relatively peaceful times in Black Marsh. Lilmoth has likely been rebuilt in some fashion and the only conflict Argonians face would likely be in the form of Dunmer rebels in Morrowind; Black Marsh itself is likely incredibly peaceful and the most serious conflict would likely be a political one which would not concern Argonians abroad.