International law like the Budapest memorandum
According to the three memoranda,[5] Russia, the US and the UK confirmed their recognition of Belarus, Kazakhstan and Ukraine becoming parties to the Treaty on the Non-Proliferation of Nuclear Weapons and effectively abandoning their nuclear arsenal to Russia and that they agreed to the following:
- Respect the signatory's independence and sovereignty in the existing borders.[6]
- Refrain from the threat or the use of force against the signatory.
- Refrain from economic coercion designed to subordinate to their own interest the exercise by the signatory of the rights inherent in its sovereignty and thus to secure advantages of any kind.
- Seek immediate Security Council action to provide assistance to the signatory if they "should become a victim of an act of aggression or an object of a threat of aggression in which nuclear weapons are used".
- Refrain from the use of nuclear arms against the signatory.
Russia signed this and has violated protocols 1,2,3 and 5