In November 1919, former chief of staff Paul von Hindenburg gave the following assessment of Germany’s defeat in World War I, giving weight to the stab in the back theory popular with right-wing nationalists:
“History will render the final judgment on that about which I may give no further details here. At the time we still hoped that the will to victory would dominate everything else. When we assumed our post we made a series of proposals to the Reich leadership which aimed at combining all forces at the nation’s disposal for a quick and favorable conclusion to the war; at the same time, they demonstrated to the government its enormous tasks. What finally became of our proposals, once again partially because of the influence of the parties, is known. I wanted forceful and cheerful cooperation and instead encountered failure and weakness.
The concern as to whether the homeland would remain resolute until the war was won, from this moment on, never left us. We often raised a warning voice to the Reich government. At this time, the secret intentional mutilation of the fleet and the army began…
The effects of these endeavors were not concealed from the supreme army command during the last year of the war. The obedient troops who remained immune to revolutionary attrition suffered greatly from the behavior, in violation of duty, of their revolutionary comrades; they had to carry the battle the whole time. The intentions of the command could no longer be executed. Our repeated proposals for strict discipline and strict legislation were not adopted. Thus did our operations necessarily miscarry; the collapse was inevitable; the revolution only provided the keystone.
An English general said with justice: “The German army was stabbed in the back.” No guilt applies to the good core of the army. Its achievements are just as admirable as those of the officer corps. Where the guilt lies has clearly been demonstrated. If it needed more proof, then it would be found in the quoted statement of the English general and in the boundless astonishment of our enemies at their victory.
That is the general trajectory of the tragic development of the war for Germany, after a series of brilliant, unsurpassed successes on many fronts, following an accomplishment by the army and the people for which no praise is high enough. This trajectory had to be established so that the military measures for which we are responsible could be correctly evaluated.”