You might have installed the optional Modern Era Support package that goes with Varietas. It's a tickable option in the BAT installer. A lot of people were asking for it, so I made it available. I find it enjoyable, but you may not. There's a way to disable it, but I'm at work atm.
I'll post the details when I get home in the morning.
Yawn...
I almost forgot...
@ Gwynnja:
If you would like to remove the Modern Era goodies from BAT, go into the modules folder, find the Varietas folder and in the subfolders, delete (or rename to a ,tmp extension) everything that begins with the words ModernEra, EXCEPT for this file: ModernEra_4VD_CIV4ArtDefines_Unit.xml
That file is needed by something else in VD.
Remember that you will break saves if you do this, so finish your current game first if you have one going.
Thanks for the replies. Is there a way to un/select it on a game by game basis? It looks like it might be fun to play with but I don't want it on all the time.