Free corps
Freikorps (German: [ˈfʁaɪˌkoːɐ̯], "Free Corps" or "Volunteer Corps") were irregular German and other European paramilitary volunteer units that existed from the 18th to the early 20th centuries. They effectively served as mercenaries or private military companies, regardless of their own nationality. In German-speaking countries, the first so-called Freikorps ("free regiments", Freie Regimenter) were formed in the 18th century from native volunteers, enemy renegades, and deserters. These sometimes exotically equipped units served as infantry and cavalry (or, more rarely, as artillery); sometimes in just company strength and sometimes in formations of up to several thousand strong. There were also various mixed formations or legions. The Prussian von Kleist Freikorps included infantry, jäger, dragoons and hussars. The French Volontaires de Saxe combined uhlans and dragoons.