"Müller History Facts" is a sole proprietorship under Swiss law based in Andelfingen (Switzerland). The company's objective is to conduct basic research and to produce and market history books. Müller History Facts specializes in conducting research on the military material of the First and Second World War. They explore the development, production, function and appearance of the weapons, ammunition and military devices used during that time. As far as military material is concerned, Müller History Facts owns one of the largest private archives in Europe, with thousands of original documents, historical photographs and pertinent books.