Original: Paul Hockenhos , Joschka Fischer and the Making of the Berlin Republic , Oxford University Press , 2007 , p 86 He studied the works of Marx , Mao and Hegel and became a member of the militant group Revolutionärer Kampf ( Revolutionary Struggle ) .
Simplified: He studied the works of Marx , Mao and Hegel and became a member of the militant group Revolutionary Combat ( ) .