DutchJob
Prince
Declare war and pillage Vienna.
You can't liberate them once they are married. The best way to deal with Austria (without simply wiping them out) is preventative measures. Sell her all your resources, embassies, open borders, etc. That way she has less money. If she allies with a city-state, spend that cash and up the ante. Out bid her for the favor of city-states. That way you can keep them out of her hands. You have to be vigilant.
The alternate way is to leave Austria be - that is not really a problem, since she isn't a warmonger herself.
Diplomatic marriage is insanely over powered.
I'm playing as the Austrians now. I've 'married' four city-states, all the ones on the continent I share with the Maya. So the Maya are outa luck - no CS bonuses for them.
Meanwhile, I'm crazy powerful. This is fun, but I'm leaning towards the 'delete the Austrians' folder solution for future games.
Austria is ridiculously over powered with the ability to grab CS's.
Any suggestions?
Except CS are pathetically weak and easy to conquer. The marriage UA is just a non-war alternative to capturing them. Every game I've ever played where Mongolia is the dominant AI civ, they wipe out every CS in the game, I've never seen anyone whining about them. Greece has always done the same thing, buy out every CS they can and leave you with nothing. Austria isn't one bit different than these other civs, deleting the Civ is probably the most pathetic thing I've read on these forums. I hate starting next to the Aztecs because they always attack me, doesn't mean I'm going to delete the Civ...