BMW
After the end of World War I in 1918, BMW was forced to cease aircraft engine production by the terms of the Versailles Armistice Treaty. To remain in business, BMW produced farm equipment, household items and railway brakes. In 1922, former major shareholder Camillo Castiglioni purchased the rights to the name BMW, which led to the company descended from Rapp Motorenwerke being renamed Süddeutsche Bremse AG (known today as Knorr-Bremse). Castiglioni was also an investor in another aircraft company, called "Bayerische Flugzeugwerke", which he renamed BMW.The disused factory of Bayerische Flugzeugwerke was re-opened to produce engines for buses, trucks, farm equipment and pumps, under the brand name BMW. BMW's corporate history considers the founding date of Bayerische Flugzeugwerke (7 March 1916) to be the birth of the company.
BMW in motorsport
Wanting a split from their failing relationship with Williams, BMW's executives decided that adding an F1 team to the company's motorsport division, thus removing the necessity for a partner, was the only viable solution. Enticed by Sauber's new multimillion-dollar research and development facility, which included an advanced wind tunnel setup, BMW choose to offer a buyout to Peter Sauber rather than scramble to build the facilities themselves. Sauber took the offer, and the buyout went through; the team began racing under the BMW-Sauber F1 name in . The team being split between the Sauber facility at Hinwil, Switzerland and BMW in Munich.