I did business with Russian Jews for 30 years ,they were hard bargainers,but when an agreement was reached ,a verbal agreement was enough .they always lived up to the terms and so did we.This was in the NYC Garment district .
They said to us”you guys do nice work”we said to them send us a check ,we did and they did.
I suspect NATO did not live up to its agreement and some fool decided to bully the Russians politically trying to out minoevour them ,forgetting they are great Chess players .Dont mess with the Russians ..live up to your agreements ! They will live up to theirs .That was my experience with them.