Edited sentence: All Reichswehr leaders from Seeckt onwards enthusiastically endorsed armor.Guderian's claim to be the 'Father of Blitzkrieg' has, however, been challenged (Corum 92 pp 137-141) as gross self-exaggeration.His publications before 1936 in professional journals were few, relatively mundane and did not address  fundamental questions of doctrine.Moreover, Guderian's claim that the Panzer advocates, of whom he claims to have been foremost, were met with resistance from within the army, especially from Ludwig Beck, has been exposed as deceitful.The famed Panzer doctrine, as pointed out by Corum, was little but its application to armor with its improved mobility.The famous Guderian book, Achtung Panzer, while advocating tank warfare and forcefully written, was not particularly original.The true mainspring of German armored doctrine was the unsung Ernst Volckheim, who receives only passing mention in Guderian's memoirs.the Reichswehr's basic doctrine emphasized speed and maneuver