The question of the Crimea is bound to play a big role in any upcoming peace talks between Russia and Ukraine.
BBC News asks in relation to Putin's 2014 re-annexation of the peninsula:
If a landgrab unrecognised by the international community is approved by the US as legal, what would that mean for international law and the principles of the UN charter?
Well.
The answer is pretty much like that after the landgrab made by NATO member Turkey in 1974 when it annexed Northern Cyprus, which it is still holding onto over 50 years later.
No-one cares about that.
Except the Greek Cypriots of course who have not forgotten how Britain, currently a cheerleader for 'sovereign integrity' but with an important bomber base on the island at Akrotiri, stood by and did nothing to stop the invasion.
So to answer the question posed by the BBC: Nothing - as usual.