Ah the twists and turns of global strategy.
I would have thought NATO, or more precisely their leading members, best approach at the moment would try and build informal links on military strategy with China so the Ruskies would have to face both ways.
Being a paranoid lot anyway that ought to keep them on an even keel after all they face USA Pop 380M , EU/NATO 400M and China 1.5Bn vs Russia 160M and not many friends of their own except a 'Stan or two.
Of course if Britain leaves the EU we will save enough money on benefits for Roumanians and contributions to Brussels that we will be able to reopen the production lines for Spitfires and build some Tribal Class destroyers so will have nothing to fear anyway. Hang on both those things need these engineer chappies don't they ? God this stuff is a bit more complicated than hedge funds...