[@Buddha] I was thinking of Wars of the Roses but I wanted more of a civil revolution than a civil war, as it were (throwing out the Norman conquerors and all that).

Indeedy. They can be of any class, although most likely to be underclass/fourth sort as it would be in a strenuous situation that any potential abilities would have first surfaced as they're not permanently at full strength. Beyond that I'll leave largely to creative freedom but I will have a proper CS layout up before long.