I think this might be the only occurence, but I can't build any of the extra units listed by the 16k casse barracks in the Casse capital. I can only build the base units. And in the Irish provinces, I can't build any of the unique units there, even though I've built what I believe are the necessary builings ( the barracks places). I don't know if I need to build other things too (which I doubt), or whether something isn't quite working right, because I've seen other casse player pics where the units I can't seem to build are being used.

My invasion of Europe failed due to my lack of more experienced sodliers.