The Dutch will blow up several dikes to flood one third of the country, in case of a German invasion. The report further analyzes how and if an invasion is fruitful for the Germans.

As Britain’s Neville Chamberlain schemed feverishly last week to stave off further German aggression, the world wondered where Adolf Hitler would next strike. The Dutch were afraid they knew.

Some military experts have long thought that, rather than a suicidal attack on the subterranean forts, tank traps and concrete…