press steel of similar thickness into the shape of the much shallower Brodie helmet was unable to do so. The original WW1 Stahlhelm wasn't bullet-resistant to pistol rounds such as 9mm Luger and 45 ACP. The steel quality by WW2 had improved enough to stop low velocity handgun rounds such as .380 ACP and 45 ACP as demonstrated by ballistic test videos on YouTube. History The design of the Stahlhelm was carried out by Dr Friedrich Schwerd of the Technical Institute of Hanover. In early 1915, Schwerd had carried out a study of head wounds suffered during trench warfare and submitted a recommendation for steel helmets, shortly after which he was ordered to Berlin. Schwerd then undertook the task of designing and producing a suitable helmet, broadly based on the 15th-century sallet, which provided good protection for the head and neck. After lengthy development work, which included testing a selection of German and Allied headgear, the first stahlhelm were tested in November 1915 at the Kummersdorf Proving Ground and then field-tested by the 1st Assault Battalion. Thirty thousand examples were ordered, but it was not approved for general issue until New Year of 1916, hence it is most usually referred to as the "Model 1916". In February 1916 it was distributed to troops at Verdun, following which the incidence of serious head injuries fell dramatically. The first German troops to use this helmet were the stormtroopers of the Sturm-Bataillon Nr. 5 (Rohr), commanded by Captain Willy Rohr. In contrast to the Hadfield steel used in the British Brodie helmet, the Germans used a harder martensitic silicon/nickel steel. As a result, and also due to the helmet's form, the Stahlhelm had to be formed in heated dies at a greater unit cost than the British helmet, which could be formed in one piece. Like the British and French, German troops identified highly with their helmets. The Stahlhelm became a popular symbol of paramilitary groups after the First World War. Such was the attachment of the World War One generation to the design that it was reportedly the reason that Hitler rejected a modernised, sloping helmet design to replace it. Stahlhelm use in other countries Germany exported versions of the M1935 helmet to various countries. Versions of the M1935 Stahlhelm were sent to Republic of China from 1935 to 1936 and the M1935 was the main helmet of the Chinese Nationalist Army