France has a special military corps, the French Foreign Legion, founded in 1830, which consists of foreign nationals from over 140 countries who are willing to serve in the French Armed Forces and become French citizens after the end of their service period. The only other countries having similar units are Spain (the Spanish Foreign Legion, called ''Tercio'', was founded in 1920) and Luxembourg (foreigners can serve in the National Army provided they speak Luxembourgish).