Hallo, gentlemen!

I am not trying to make a competition here, between this and the other quiz. But I think that two quizes would be more fun and it would mean that there are more chances to answer and ask.
Beside, I expect this would be a much more free quiz not so estrict and specifically about WWII.

So, I will post the first question. An easy one.

Name the man who invented the theory of Blitzkrieg. (Well, the tactics and the roots of it. Not the name, that was invented by Herr Goebbels).

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"War is less costly than servitude, the choice is always between Verdun and Dachau." - Jean Dutourd, French veteran of both world wars

"A mon fils: depuis que tes yeux sont fermes les miens n’ont cessé de pleurir." - Mère française, Verdun