I know some people have been asking for the game to have more lore behind it but I haven't seen anyone mention the few paragraphs of lore they've given in the new expansion rules. It's not a lot, but there's some interesting stuff for people looking for more story or painting ideas:
1. The "Burned Dead", a unit of Reanimate Archers with charred black bones and armor, bandits who were burned alive for their crimes.
2. The "Shattered", another unit of Reanimate Archers who use fragments of Waiqar's bones in their arrowheads.
3. For the Oathsworn, they're generally knights and noble-born soldiers like you'd expect but there's mention of common-born cavaliers too, notably the Riverwatch Riders. I perked up at that as they're a unit in Battlelore 2nd Edition. They're more of a fast moving light cavalry in that game but their little excerpt in the rules mentions they're generally used as scouts but "are often equipped as heavy cavalry when the needs of war demand.".