Berlin's and London's Approach is more prudent...

 USA blessing a sort of yet clear is necessary for all to see , yet all western soldiers will have to deploy in Western Ukraine , better protect cities , infrastructure , logistics e.t.c the use and in time co use maybe the tools.

And yes they can be targeted Kremlin can be hitting in blind and if someone dies by a scratch or excessive sexive exercise they say they did it to play with our mainly mine nerves for the sake of "propaganda"...

So NATO is not directly involved yet independently NATO allies may assist Ukraine in that manner and of course the deals that come after...

NATO or No NATO There will be most probably no USA direct involvement in this as well yet monitoring , counseling is necessary in Brussels as usual.

U know the drill and if it gets fucked it is all your god euro damn fault do not throw that cross on me...

Getting hit in an out of NATO region as a well standing independent entity means u are on your own , u may cry later back home in your own personal dark corner if your ass gets kicked no Article 5 for you dear...
Who ever wishes among us escalation in that manner he/she better tell Donald Straight in the eye to get a better more proper yes or no answer with the world watching...

That also means even if all 27 Euro States decide to send some kind of an army , trainers , advisers you name them , it is a risk and you know it in this jungle of the post soviet man...

Big Boys and gals u all...