I mean, if NATO is gone by this time next year.
Assuming that Trump cannot goad North Korea into a real fight, and assuming that the US must use one or two million tons of bombs every five years or so.
Russia already had what was arguably the most successful infiltration of Crimea, without too much use of actual explosives.
It doesn't look like Europe is going to pay their protection money, so I can imagine that it would be bad form not to rough up a few "European" nations on the periphery of the core of Germany/France.
I get the feeling the US is getting tired of dropping bombs on Asia with little gain. Time to try somewhere else?