Deutsche Militärmotorräder - Seit 1905German Military Motorcycles: A Historical Journey Discover the fascinating development of German military motorcycles, which began at the beginning of the 20th century. Although motorcycles only really began to gain traction during the First World War, their development continued in the post war period with strong Kradschtzen units in the Weimar Republic. In 1938, BMW and Zndapp began the development of the so called heavy motorcycles with off road