Thanks, Adam. I appreciate the response. What I was actually looking for was the values Marketo uses when you select "Europe" when targeting by country in a smart list. I tried using it instead of naming the individual countries but it didn't seem to work.
I don't think this is all of them but this will give you the majority I believe:
Albania Andorra Armenia Austria Azerbaijan Belarus Belgium Bosnia & Herzegovina Bulgaria Croatia Cyprus Czech Republic Denmark Estonia Finland France Georgia Germany Greece Hungary Iceland Ireland Italy Kosovo Latvia Liechtenstein Lithuania Luxembourg Macedonia Malta Moldova Monaco Montenegro The Netherlands Norway Poland Portugal Romania Russia San Marino Serbia Slovakia Slovenia Spain Sweden Switzerland Turkey Ukraine United Kingdom Vatican City
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Adchoices