Well what I mean is tanks across the border. Some psyops and a drone here and there is not really cause to go all out. A tank division invading Poland would be, of course.

And Europa has some deterrent but nothing compared to the Russian one. We have a major 'missile gap' right now.

> Europe already has a nuclear deterrent.

This is not true. UK and FR have them (probably not enough though). UK/FR definitely wouldn't retaliate if Berlin or Warsaw were to be hit by a RU nuke.