For sure it won't be easy, because it would be the first time NATO would have to engage in a conventional war with a country with nukes. That's the whole point

For sure it won't be easy, because it would be the first time NATO would have to engage in a conventional war with a country with nukes. That's the whole point Russia counts on: that the nukes will scare NATO partners away. But this would be a suicidal move that would make no sense. And in a conventional war Russia stands no chances against the armies of NATO.