I don't think you understand the difference between https://en.wikipedia.org/wiki/Budapest_Memorandum_on_Securit...

and a meeting 'memo', when you say 'memorandum'. Hearsay is something someone says about what they've heard. Which is what you linked. Also, the plural of memorandum is 'memoranda'.

I still haven't seen any treaty in your links.

> Verbal guarantees were given on many occasions but conveneniently forgotten or dismissed later on.

Putin also said, months ago, that he's not going to invade Ukraine and that the West is creating panic. But we're conveniently forgetting these 'verbal guarantees', right?

> It is just a fact of life that smaller countries are more frequently invaded

Yeah, 'just a fact of life'. NATO expansion into smaller countries, due to this 'fact of life' is a 'fact of life' itself.