Dunkerque is also a good candidate for more defensible terrain, having been besieged twice. Not sure if it should be urban or swamp (or a river/mini-strait like in Hong Kong), since the main German defense was actually flooding the fields around the city (IIRC). Besieging a plains province just doesn't make sense and rarely happens naturally.
FTR, I'm also not advocating more "detailed" province borders or a complete redesign of the world map. The minimalistic HoI-style borders are fine design-wise, IMHO. The image was just the first one I could find on Wikipedia that showed the division I had in mind (3 cross instead of 2 long). It only helps that this was the historical division anyway. If we used it, Oppeln doesn't even need to be made urban, since the city would actually be quite close to the province border to Breslau.
FTR, I'm also not advocating more "detailed" province borders or a complete redesign of the world map. The minimalistic HoI-style borders are fine design-wise, IMHO. The image was just the first one I could find on Wikipedia that showed the division I had in mind (3 cross instead of 2 long). It only helps that this was the historical division anyway. If we used it, Oppeln doesn't even need to be made urban, since the city would actually be quite close to the province border to Breslau.