So there's heavy overcast and the lighting looks like it's dawn or dusk, or high noon in Finnish midsummer.
Lighting would point more towards Pegasus than Gold Beach, though wouldn't airborne maps for D-Day be night maps instead?
No snow so no Ardennes, and I'm ruling out Eastern Front as well (because then it would be a different dev who scouted the location). More battles in the Hürtgenwald region is of course a possibility - I doubt that the devs had the resources to secretly expand to Operations Market/Garden. There was that map set in Germany on the test server once...