Maschinenbau Kiel  Maschinenbau Kiel GmbH designed, manufactured and marketed marine diesel engines, diesel locomotives and tracked vehicles under the MaK brand name. The three primary operating divisions of Maschinenbau Kiel GmbH were sold to different companies in the 1990s. Rheinmetall acquired the military vehicles division in 1990. Siemens acquired the locomotive manufacturing division in 1992. Siemens sold the locomotive division to the current owner, Vossloh, in 1998. Caterpillar Inc. acquired the marine diesel engine division in 1997. Both Vossloh and the marine diesels division of Caterpillar are still based in Kiel, Caterpillar continues to use MaK brand name on their products. The companies are major employers in Kiel. The companies origins can be traced back at least as far as 1918. With the Treaty of Versailles limiting arms production in Germany, the defence based industries in Kiel sought other markets. Kiel Deutsche Werke AG (DWK) was founded; producing diesel locomotives as well as shipbuilding and firearms manufacture. During the second world war Deutsche work produced U-boats, as well as locomotives for the Wehrmacht. The end of the second world war brought not only destruction of many of the facilities in Kiel, but also the end of the company. The first production Marder was handed to the West German army on 7 May 1971. Production of the vehicle continued until 1975, with 2,136 vehicles being completed. The company "Maschinenbau Kiel" was founded on 25 May 1948 as a limited liability company. It included several factories of the former Deutsche Werke AG. In 1954 after a lengthy legal dispute with MAN the name was changed from MAK to MaK. In 1959 a crisis led to the company's purchase by Bremer Atlas GmbH and its conversion into a GmbH (a type of limited liability company). In 1964 MaK became part of the Krupp group due to the take over of its parent company. By 1990 the production of the Leopard 2 had ended and the prospect of future orders was uncertain; the military equipment production division was organised into a new company MaK System GmbH. which was acquired by the cannon manufacturer Rheinmetall. The locomotive production arm of the company was sold in 1992 to Siemens. In 1997 the marine engines part of the business was sold to Caterpillar Inc.