I see the Budapest memo referenced a lot but, obviously, it's a memo ... about ways to get rid of nukes. It's not a treaty that obligates anything at all from the United States or anyone else in terms of security support or guaranteeing Ukrainian sovereignty. I will grant, however, that the Ukrainians (and the Russians, we made promises to them in it too) probably feel pretty slighted with how history turned out in the ensuing decades.

From your link:

>>Another key point was that U.S. State Department lawyers made a distinction between "guarantee" and "assurance", referring to the security guarantees that were desired by Ukraine in exchange for non-proliferation. In the end a statement was read into the negotiation record that the (according to the U.S. lawyers) lesser sense of the English word "assurance" would be the sole implied translation for all appearances of both terms in all three language versions of the statement.

>Which other conflict is waged with the goal of eliminating the country completely and destroy its culture?

There's a lot going on in Africa and the Horn. More or less all feature some degree of genocide or mass killings, objectives of replacing the current government, or redrawing the lines on the map.

>There were no major conflicts of this kind since WW2.

This is absolutely not true. Korea, Vietnam, Afghanistan (the first one), Myanmar and a couple others I'm forgetting all were an order of magnitude larger than this one in terms of casualties. Maybe you mean this is the first major conflict of this kind in Europe since WWII, in which case... maybe, because you'd have to omit Yugoslavia. There's room to argue about that one. Not sure why that's relevant, unless we're going back to the insistence about the United States' role in security on the European continent.