The campaign isn't finished yet, and there are some bugs, but I played a few custom battles and they worked just fine. The mod is not yet complete, but from my play session I'd say it's off to a good start.
There's a full map as well, based on The Elder Scrolls games, and appropriate custom banners will snap in the wind as you march your armies into battle. They're all custom skinned, so if you choose to side with Oblivion you'll really be marching around an army of Daedra. You can play as monsters too, like the hordes of Oblivion or an army of undead warriors. There are 20 factions to choose from, including The Kingdoms of Skyrim, Daggerfall, and Wayrest, the Clan of Blackmarsh and the Clan of Crowns, and the Great House of Hlaalu, Telvanni, and Dagoth, just to name a few.