This would mean the disintegration of NATO, and likely at a time when China also decides to move on Taiwan. It's also unclear whether the US has the will to do more than protest strongly at UN meetings.
I, for one, look forward to Europe reasserting itself globally. They’ve been in time-out long enough. Sure it leads to great domestic social programs while their neighboring regions burn or are managed by others, but they could be doing more for the world than convening accords, agreements and half-hearted condemnations nobody really takes seriously.
They’re the Floyd[0] of global politics, laying on the couch smoking pot while reminding you to buy some cleaning products while you’re out.
But for a Baltics invasion, it would.