So this is a work in progress, so far there is no campaign, only custom battles. But they have added quite a few Countries.
The most fleshed out factions are England and France.
With about a dozen nobles each, with their heraldry.
Meaning you can make part of your army from the retuine of William Marshal or the enitre army.
The forces are divided into 3 tiers.
First tier "early"
2nd is High
And 3rd is Late.
Now these does not correspond to the Early, high or late medieval period. Since the game start in 1200, each tier corresponds to about 100 years,
Early is 1200-1300, high is 1300-1400 and late is 1400-1500.
Early period is definitely the period with the most work done.
Besides England and France, other factions are quite fleshed out. To my surprise, Norway was very well done, with quite a few units(in fact far more than Sweden, who had almost no High period units,)
Most of the major players of the Medieval period is there, From west and south, to north and east, ala the way down to Africa and middle east.
Hopefully, they will be able to add the campaign map.
But even with just custom battles it's quite fun.
Some pics