If you read the memorandum text, at most the US promised to go to the UN security council if Ukraine's territorial integrity was threatened. https://treaties.u

If you read the memorandum text, at most the US promised to go to the UN security council if Ukraine's territorial integrity was threatened. https://treaties.un.org/doc/Publication/UNTS/Volume%203007/Part/volume-3007-I-52241.pdf https://treaties.un.org/doc/Publication/UNTS/Volume%203007/P... There is a lot of misinformation floating around the internet about this memorandum. Furthermore, even Wikipedia states: "The Budapest Memorandum is not a treaty, and it does not confer any new legal obligations for signatory states. It was written in a way to avoid an impression of legal obligation."