I was deeply moved by the incomparable achievements of the German Wehrmacht, leading to such prodigious successes. I followed the development of operations in minute detail with the aid of maps. Under brilliant leadership all sections of the armed forces displayed the greatest courage to achieve deeds that were quite stunning. The ignominy of November 1918 in the forest of Compiègne has been wiped out and the Diktat of Versailles torn up!

Letter to Kurt Jagow (5 July 1940), quoted in John C. G. Röhl, Wilhelm II: Into the Abyss of War and Exile 1900-1941 (Cambridge: Cambridge University Press, 2014), p. 1238.