Probably not, per Wikipedia: > According to Stephen MacFarlane, a professor of international relations, "It gives signatories justification if they take action

Probably not, per Wikipedia: > According to Stephen MacFarlane, a professor of international relations, "It gives signatories justification if they take action, but it does not force anyone to act in Ukraine." [...] Regardless, the United States publicly maintains that "the Memorandum is not legally binding", calling it a "political commitment".