The Wehrmacht was officially reestablished only in 1936. However, the groundwork for building the army had already been laid long before that. Officially, the Reichswehr of the Weimar era never had more than 100,000 members, no heavy weapons, and no armored vehicles. Secretly, however, research and work were already underway. This Spielberger volume presents the developments that would lead to the first armored vehicles of the Wehrmacht. With many photos, drawings, and technical data and facts, it also explains the background of the covert rearmament in the Weimar Republic.