Gudrun Ensslin was a German far-left terrorist and founder of the West German far-left militant group Red Army Faction.

The Red Army Faction, also known as the Baader–Meinhof Group or Baader–Meinhof Gang, was a West German far-left militant group founded in 1970 and active until 1998. The RAF described itself as a communist and anti-imperialist urban guerrilla group. It was engaged in armed resistance against what it considered a fascist state. Members of the RAF generally used the Marxist–Leninist term faction when they wrote in English. Early leadership included Andreas Baader, Ulrike Meinhof, Gudrun Ensslin, and Horst Mahler. The West German government considered the RAF a terrorist organization.