Red Army Faction in November of that year, the Federal Constitutional Court (Bundesverfassungsgericht) demanded that they return to custody. Only Horst Söhnlein complied with the order; the rest went underground and made their way to France, where they stayed for a time in a house owned by prominent French journalist and revolutionary, Régis Debray, famous for his friendship with Che Guevara and the "foco" theory of guerrilla warfare. Eventually they made their way to Italy, where the lawyer Mahler visited them and encouraged them to return to Germany with him to form an underground guerrilla group. The Red Army Faction was formed with
Army group Army group An army group is a military organization consisting of several field armies, which is self-sufficient for indefinite periods. It is usually responsible for a particular geographic area. An army group is the largest field organization handled by a single commander—usually a full general or field marshal—and it generally includes between 400,000 and 1,000,000 soldiers. In the Polish Armed Forces and former Soviet Red Army an army group was known as a Front. The equivalent of an army group in the Imperial Japanese Army was a "general army" (). Army groups may be multi-national formations. For example, during World