In 1936, as the Arab Revolt began, she joined her brother in the Irgun. She took a first aid course and in August she took part in a reprisal. In 1939 she became the first broadcaster of the Irgun's underground radio station, Kol Zion Halohemet, as well as a writer for "Hamashkif", its newspaper. In 1943 she was selected to be a member of the Irgun's command structure.