Yeah, the crisis during the downing of Korean airlines flight caused a lot to escalate the cold war, almost at the levels of cuban crisis. the problem is during this time people have been totally aware of the scary situation, and with the counterculture at work, with rallies and whatnot, both...
Challenge: With a POD of at least during Cuban Missile Crisis, Dismantle all nations and turn them into at least 500 micro-states, city-states etc. You can use nukes.
They will pull out anyway, either through US pressure (or even threats of war, which is improbable) or the worsening economic problems back home (which is the most probable thing if the POD is Andropov living longer or Gorbachev not rising to power)
Maybe make swedes less isolated in the great northern war,
like prussia helping or whatnot,
of course that would make changes to the War of the spanish succession,
well that _might_ make the two conflicts combine,
with franco-swedish alliance and a great Quintuple alliance