wbl parent
A nuclear weapon does not do very much to a tank unless it is extremely close. You are better off with a guided munition.
A tank doesn't do much without a significant amount of combat support and logistics backing it up.
It wouldn't be clear of the fallout before it ran out of fuel.
In the war plan under discussion IIRC all the nuclear bursts were air bursts, so minimal fallout, not enough to kill anybody even right after the strike.
Or all the bursts in the territory earmarked for invasion were air bursts while some of NATO's air bases outside the invasion area get hit with ground bursts (to maximize destruction of the runways).