So I've been playing the Elder Kings mod for CKII for a little while now, and I love it so far. It's a total overhaul mod that plays out in the Elder Scrolls world during the second era, and Tamriel is split into countless little warring states. You can play as any of these states you want, and conquer all of Tamriel and Akavir, and can even conquer the Draugr in Atmora and the Maormer of Pyandonea. And you have almost 2000 years to do it
So here is my campaign. Since Argonians are my favourite race in TES, I found it natural to play as a nation in Black Marsh
So I'm currently playing as High King Mahei 'the Iron Hand' of Argonia, which was unified by his father, High Chief Ilas-Tei of Archein, who unfortunately got known as 'the Naughty'. I forgot to take a screenshot during that time, so this will have to do. So currently, all that is left in my way for a unified Argonia is the conquest of the tribe Sarpa and a war against the Dunmer of Morrowind. Then I plan on either conquering Nibenay or Elsweyr.
A nice addition in this mod is the "Warlord" trait which allows you to declare war against any neighbouring nations and annex all occupied territories if you win. It allows for quick expansion as long as you have enough people to fill up the conquered land as vassals