I believe it was generic WWII because I seem to remember playing a "jungle" scenario where the tanks were confined to a single road, but it was a long time and many games ago.
I'm really looking forward to CM:BN. How well my iMac's 256MB Radeon HD2600 handles the demo will be key. I realize scenario size will likely make a big difference in this regard, but at least I can get going with small stuff. Then, who knows, the iMac may accidently fall on the floor.