[kisstheblade]

Why is it considered "all or nothing" when discussing NATO involvement? NATO has been known to defend (or "defend", take your pick) multiple non-NATO countries in the past, no total war started.

So if NATO put troops in ukraine to just defend it (not attacking pro-actively russian forces or territories), what would happen?

Is the scare now that Putin is so mad that he would immediately start nuking random NATO cities around the world if that happened?