[MichaelCollins]

> which would be technically WW3.

I think it's important to remember that NATO isn't an unthinking machine that executes mechanistically. Supposing Russia had been responsible for those missiles, I sincerely doubt that would have been the start of WW3. Nobody really wants that outcome, so the humans in the loop would bend over backwards to find a way to prevent that. This might mean pretending to not notice the missile strikes, or asserting they were accidents. I think both Russia and NATO would prefer Russia admitting to an accident and paying out some reparations to a full blown WW3.

WW3 happens if there's really no other choice, as perceived by NATO and/or Russian leadership.