The factory was founded in 1915 by Daimler Motoren Gesellschaft to produce aircraft engines, hence why the plant initially had a runway located onsite. Post-World War I the first passenger car was manufactured, following the merger with Benz & Cie. founded by Karl Benz. In 1926, the entire body shop of the new Daimler-Benz group was relocated to the Sindelfingen plant, allowing plant manager Wilhelm Friedle to introduce assembly line production the following year, and in 1929 the first press shop was opened. By 1938 the plant employed about 6,500 people, and in the lead-in to World War II most production was aligned to military contracts, mainly trucks such as the LC 3000; passenger car production ceased by 1942. Initially replacing male workers with local women, Mercedes then took forced labour, including prisoners of war. Western European prisoners were initially housed in near-by boarding houses, but with the start of the Eastern front the local Nazi administration formed the co-located Riedmühle concentration camp, which from 1942 loaned workers to the company in return for payment to the Nazi Government in Berlin. By 1944, almost half of Daimler Benz's 63,610 Daimler Benz employees were civilian forced labourers. Post-WW2, Daimler-Benz admitted its links with the Nazi regime, and became involved in the German Industry Foundation's initiative "Remembrance, Responsibility and Future".