Worldwide weapony post-T2K

[Legbreaker]

It doesn't have to be the Soviets nuking France - there's plenty of other countries that may do it, out of spite for not upholding their treaty obligations if nothing else.
Or it could have been the Soviets. All they'd need to do is put the blame on somebody else and with the French invasion of Germany (to the Rhine) they'd have a perfect excuse to point the finger at either Germany, the US or even Britain.
It could be argued that Nato commanders/politicians honestly believed the French had climbed into bed with the Italians (another former Nato partner) and were opening an additional front behind Nato lines.

Anyway, the point is it's possible France was indeed nuked.