the development of industry and science have changed war faster than the people running the war realized it, two block of industrialized contries have not go into all out war before this.

...displayed disdain for innovation and a profound ignorance of modern warfare, particularly the impact of tanks, which he saw as "incapable of ever replacing cavalry". During Marshal Mikhail Tukhachevsky's Great Purge trial he stated that Tukhachevsky's efforts to create an independent tank corps (which the Germans, Americans, and the British had already done and the USSR would hastily adopt in 1942) was so inferior to horse cavalry and so illogical that it amounted to deliberate "wrecking"