While Panzer Divisions were first being developed requirements were given for a personnel carrier that was armored and could carry the infantry into battle. In 1935 it was suggested that an armored body could be placed on a medium half track tractor. The SdKfz 11 became the basis for the chassis. Produced by Hanomag, but the hull and superstructure were built by Büssing-NAG. 22 different models made.