Is there a way to check and see how advanced another countries Army is?
Also I annexed this small Asian country (i cant remember it's name), but its region is not showing up in my production/factories list.
It a battle you can see what units they are using, but for details you have to cheat. (tag switch or load as them from a save)
Check that you are showing rather than hiding empty states on the production tab, and it could be a colony if you took it off an unciv, and you can't build factories in colonies.