Ah, Dai, that's a letdown when the idea is only to cite what seems fitting. But I'll try it the Nostradamus scholars' way:

The first two lines are obvious. The third line only seems to be a puzzle at the first glance. But wait: The sister of the leader of France obviously means the USA. 'Sister' is 'soeur' in French and the statue of liberty which in Europe stand pars pro toto for the USA was transported from France to the USA by a ship called 'Isere' which sounds similar to 'soeur' which only shows how cleverly Nostradamus disguised his prophecies. And the USA fear that as so often in former times common Nato action will be prevented or made difficult by France.

Line four: The fight will be on several battlefields and the 'Idiot heir' is a weak leader conceding the real decisions to his generals.

Or of course the sister of the leader of France means the English queen (thinking back at the entente cordiale) and this line predicts a future terror attack on Britain by Arabs coming over from France.

But then lets not come to hasty conclusions: in the French original it is 'le chef de France' and that could mean that a French cook will try poison the leader ('soeur' = Sire = leader) of the Western world.

Wolfgang