Hugo Schmeisser (24 September 1884 – 12 September 1953) was a German developer of 20th century infantry weapons. Schmeisser was born in Jena, Thuringia. His father, Louis Schmeisser (1848–1917), was one of the best-known weapons designers in Europe. The life and work of Hugo Schmeisser mostly took place in the weapons manufacturing city of Suhl, Thuringia. Before and during World War I The submachine guns of Theodor Bergmann are closely connected with its name recognition and weapons production in the time leading up to the First World War. Schmeisser also received his fundamental training in weapons technology at Bergmann, where 7.63 mm and 9 mm machine gun rounds were being researched. He remained in Suhl during World War I because of the importance of his expertise in machine gun technology. Before and during World War II Manufacturing regulations in the Treaty of Versailles (June 28, 1919) forbade Germany from developing heavy machine guns, but permitted machine pistols or submachine guns as a suitable weapon for police. This signaled the end of a 30-year cooperation between the Schmeissers and Bergmann as production was licensed to foreign weapons manufacturers. Schmeisser decided to continue work in weapons development. Together with his brother Hans Schmeisser, he created the "Industriewerk Auhammer Koch und Co" (Industrial Auhammer Koch and Company) in Suhl. Being at the end of World War I, he saw little business, and encumbered by the Treaty of Versailles, the future of the company was unclear. Schmeisser defied the treaty, working to continue development of automatic weapons. It was at this time that the company began cooperating with: C. G. Haenel Waffen- u. Fahrradfabrik Suhl (C.G. Haenel), beginning a 20-year partnership. For the safety of his patents, Schmeisser created a second company under the name of "Brothers Schmeisser" in the summer of 1922. This shrewd tactic was to prevent the loss of his patents if Auhammer went bankrupt. In order to prevent bankruptcy on both sides, Auhammer and Haenel merged, with Haenel taking full responsibility and liability for Auhammer business affairs. Schmeisser's attorneys who settled the deal became active shareholders in the company. Before long, it was obvious that development of many types of automatic weapons was unaffected or even accelerated by the Treaty of Versailles. In the 1920s Schmeisser developed the MP28, which was used extensively by the German police. Bayard signed an agreement with Schmeisser to manufacture and sell weapons to South