The motorclubs HAMOVE (Hengelo Gld, The Netherlands), KV Ostend Motorsport (Oostende, Belgium) and MSC Frohburger Dreieck (Frohburg, Germany) have started an international competition in 2003. The name of the competition was '3 nations cup'. The goal of this cup was an international competition between 10 Dutch drivers, 10 Belgium drivers and 10 German drivers. The total competition existed of 6 manches, 2 at every event. Since 2010 the competetion extended to more events and more nations as IRRC.
Source : http://irrc.eu/history