In the 2014 edition of "Breaking Point", Doughty described how in a 1956 publication, Fuller wrote that the Battle of Sedan was an "attack by paralyzation" that he had devised in 1918 and incorporated into Plan 1919. Doughty wrote that although the Germans hoped for a quick victory, there is little evidence to support Fuller and that if the military theory later labelled "Blitzkrieg" was influential in the German officer corps, only those like Manstein and Guderian had fully accepted it. The disagreement between Kleist and Guderian that led Guderian to resign on 17 May, showed the apprehensions of the German high command about the speed of movement and vulnerability of the XIX Panzer Corps. Doughty suggested that the development of the Manstein Plan showed that the force sent through the Ardennes was intended to follow a familiar strategy of intended to encircle and annihilate the Allied armies in (cauldron battles). Twentieth-century weapons were different but the methods were little changed from those of Ulm (1805), Sedan (1870) and Tannenberg (1914). When German forces broke through on 16 May, they did not attack French headquarters but advanced westwards in the manner of a cavalry raid.