Europe is a complete nuclear wasteland, it is the front of the warring two world powers with many allies. Hundreds of squads have died here, many bombs dropped, spies lurking, and squads regrouping attacking and relentlessly defending.
The sheer destruction of Europe in E4 is great to me, a place where 3 major alliances once lived peacefully, now a utter wasteland with half the ops covered in high doses of radiation.
God I love world wars.