could be that this statement from Zelensky (2/19/22 reporting date) is either alarming to Putin or seen as enough of a justification for escalation politically
"The Minister of Foreign Affairs has been instructed to convene [consultations. If they do not take place again or their results do bring security guarantees for our country, Ukraine will have every right to believe that the Budapest Memorandum does not work, and all 1994 commitments will be called into question," the President of Ukraine said.
The Budapest Memorandum, signed on December 5, 1994, by Britain, Russia, the United States and Ukraine, provided guarantees of Ukraine's security and territorial integrity in exchange for Kyiv's surrendering of nuclear weapons.
could be that this statement from Zelensky (2/19/22 reporting date) is either alarming to Putin or seen as enough of a justification for escalation politically
https://uawire.org/zelensky-ukraine-may-reconsider-its-nuclear-status
just something I uncovered today - not sure if it is directly related to the invasion, but seems like as good a candidate as any others floated so far