As I’ve been saying, one place this could trigger war is the Balkans, things are already tense right now in Bosnia. Then you have the prospect of Croats supporting NATO against Russia, which won’t please the Serbs.
A Balkans fight triggering a cascade of alliances across Europe. That sounds familiar... I know I must have heard that somewhere before...
F*** Russia and f*** the Serbs. The world does not bow to them.