Hypothetical: Putin bombs Poland and/or Baltics. What happens?

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Complete hypothetical: Putin bombs Poland and/or the Baltic states.

How would the world respond? What would NATO do? What would China do? Who would support Russia?

This would be full out war, kind of WWIII, but not the same scale as WWII, since Russia wouldn't have many allies. China would not ally with Russia.

[○∙◄☻¥tπ[╪AV┼cVê└]

Nuclear War, between the European states that have Nuclear Weapons and Russia and China (Republicans and Congressional Liberals successfully block U.S Intervention)

Russia ends up occupying a European wasteland (as they have more nukes than Europe) With the exception of Britain, which they don't bother to occupy.

Putin considers preemptively bombing the U.S, but decides against it.

Please, they got 77 Senators and most of the House to vote for a completely unjustified war. This would obviously pass Congress.