She also targeted anthroposophy, notably in her 1933 essay "The Miracle of Marne". She and her husband argued that General Helmuth von Moltke the Younger had lost the First Battle of the Marne because he had come under the control of Lisbeth Seidler, a devotee of Rudolf Steiner. As a consequence of these writings the Ludendorffs added occultists to the Stab-in-the-back legend.