France's defeat in 1940 was one of those events that ‘shook the world.” Its swiftness and completeness amazed even the Germans. But the mere fact of the defeat is, in long range terms, perhaps less important than the factors that caused it and the reactions that followed it.
At the outset, it should be remarked that this whole subject, involving as it does the field of socio-psycho-politics, is still wide open, at least so far as France is concerned. Except for tendentious tracts, some technical military monographs, and the expected autobiographic apologias, there is little to go on. French scholars have not done much objective research on the causes and consequences of the tragedy of 1940.