How would you approach preventing a nuclear armed state from invading their neighbor?

The only lever they (EU and member states) had was economic, there were zero diplomatic or military options. Russia is essentially a nuclear-armed mafia-owned gas station, so not buying NG would’ve helped a bits

Preventing them from invading doesn’t really seem possible once you account for nuclear weapons.

I have zero sympathy for von der Leyen, by the way. The only thing that she's good at is failing upwards.