Berndt Andreas Baader (6 May 1943 18 October 1977) was one of the first leaders of the West German left-wing militant organization Red Army Faction (RAF), also commonly known as the Baader-Meinhof Group.

The Red Army Faction (RAF, German: [ɛʁʔaːˈʔɛf] (listen); German: Rote Armee Fraktion, pronounced [ˌʁoː.tə aʁˈmeː fʁakˌt͡si̯oːn] (listen)), also known as the Baader–Meinhof Group or Baader–Meinhof Gang (German: Baader-Meinhof-Gruppe, Baader-Meinhof-Bande, German: [ˈbaːdɐ ˈmaɪ̯nˌhɔf ˈɡʁʊpə] (listen), active 1970–1998), was a West German far-left militant organization founded in 1970. Key early figures included Andreas Baader, Ulrike Meinhof, Gudrun Ensslin, and Horst Mahler, among others. The government of the Federal Republic of Germany considered the Red Army Faction to be a terrorist organization. The group was motivated by leftist political concerns and the perceived failure of their parents' generation to confront Germany's Nazi past, and received support from Stasi and other Eastern Bloc security services.The Red Army Faction engaged in a series of bombings, assassinations, kidnappings, bank robberies, and shoot-outs with police over the course of three decades. Their activity peaked in late 1977, which led to a national crisis that became known as the "German Autumn". The RAF has been held responsible for 34 deaths, including industrialist Hanns Martin Schleyer, the Dresdner Bank head Jurgen Ponto, and the federal prosecutor Siegfried Buback, as well as many secondary targets, such as chauffeurs and bodyguards, with many others injured throughout its almost thirty years of activity; 26 RAF members or supporters were killed. Although better-known, the RAF conducted fewer attacks than the Revolutionary Cells, which is held responsible for 296 bomb attacks, arson and other attacks between 1973 and 1995.Sometimes the group is talked about in terms of generations:

the "first generation", which consisted of Baader, Ensslin, Meinhof and others;

the "second generation", after the majority of the first generation was arrested in 1972; and

the "third generation" RAF, which existed in the 1980s and 1990s up to 1998, after the first generation died in Stammheim maximum security prison in 1977.On 20 April 1998, an eight-page typewritten letter in German was faxed to the Reuters news agency, signed "RAF" with the submachine-gun red star, declaring that the group had dissolved. In 1999, after a robbery in Duisburg, evidence pointing to Ernst-Volker Staub and Daniela Klette was found, causing an official investigation into a re-founding.