german high command

Between 1914 and 1918, The German Empire had 3 Chiefs of the “Oberste Heeresleitung”, the High command of the German army. Helmuth von Moltke “The Younger”, led it in 1914 during the Invasion of France, and is much criticized for his over cautious attitude (especially when he transferred 2 Army...

I'm having trouble finding a decent explanation on how Germany's OHL worked and who was who at the outbreak of war. I'm also curious how the structure worked. Help?

Another rotor machine encryption machine used during WWII, by the German High Command, was the Lorenz machine. It used a more elaborate Cipher, and doubled as a teleprinter, enciphering and deciphering text automatically, so that those operating it never read or wrote the ciphertext. By the way...