Consimworld for this series shows that a Dave Clark posted a Korean expansion for the TWW series, but the website is down. I've never played or seen it, myself. EDIT: Ah, it's here: https://drive.google.com/drive/folde...lI4Yl8td2NOdjA
I am a huge fan of the TWW series and would really like to try out the Korean Expansion. One thing that you can really see from the map is the compressed front. I think the German front is 25-30 hexes and the Korean one at some points is only 4. That is going to be some mean, close in, knife fighting right there.