Don't be so sure, NATO has to agree 100%. Putin realizes that NATO countries don't have the stomach to enter into war. A look back in history, Hitler sent troops to occupy Austria in 1938 and the following year annexed Czechoslovakia. Hitler’s open aggression went unchecked, as the United States and Soviet Union were concentrated on internal politics at the time, and neither France nor Britain (the two other nations most devastated by the Great War) were eager for confrontation.
We are so weak today that we didn't remove Russia from SWIFT as stated earlier.
Weakness breeds aggression, say what you want about our previous president, but this isn't happening if he's in office. Elections have consequences, many people will die needlessly in this war, so your vote counts. 3 more years of weak feeble leadership. Hoping for the best, but Putin has gone down a bad road and may not turn back.