Putin has started a small invasion of Ukraine: he has recognized the
independence of the two rebel areas (which he created with Russian
money, arms and soldiers),
and saying he will send soldiers there as
"peacekeepers".
At one level, this announcement acknowledges a fact he has hitherto
denied: Russian arms and troops are in Donetsk and Luhansk. At
another level, calling them "peacekeepers" signals that they will
attack. Putin's approach to truth is like Republicans': he reverses
important truths to show that no one has the power to make him stop
lying.
Because this is a small invasion as invasions go, it puts NATO in a
quandary. To disregard it means Putin can seize anything and get away
with it, as long as he does so by small steps. But because it is so
small, any substantial response is too big, disproportionate.