This might be a feature. I remember one of the developers making a cryptic comment, which implied that units do not gain experience.

I know that someone DID say that the soverign got exp from their units exp, don't know anything else.

The units gain experience accord to the combat results, but they doesn´t accumulate, so each new combat they begin with 0 XP.

Maybe the system for what to do with the experience for units isn´t still implemented.

One question about sovereign´s experience: I have seen another sovereigns with a value of 9 for his attack skill, whereas my sovereign doesn't reach 6 (max. 5.75) even after a lot of combats (with spiders mainly). ¿Some hint about this issue?

Ah!, it´s true. It seem that there is only 2 items at this stage: the +10 hit points ring/crown and this ring that you say.

But in that case the attack value would be 10, not 9, wouldn´t it?. Because the base attak for sovereigns seems to be 5.

Parriden, yes, tha last of the The fallens. I began a game with this faction but probably it crashes at the very beggining or I was too much brave and lost.

But I will check it, thanks!.

Ya it seems that xp goes to the sov and not the units.... but I hope that units can level up too. Like sov can level alot, heros at least level half as much as a sov and finally units level up at least half of what heros can level up. Then ya worry about your good veteran units thats been with ya most of the game...

If it's intentional, so be it, but I would certainly like to see regular units accrue experience through battle and become more effective, even if only slightly.