In the 1936-39 Arabs riots fought as an Irgun member against rioters. Also took part in bringing the illegal Af-Al-Pi immigrants to shore.
Took part in Irgun actions against the British, was arrested in 1944 and sent into exile in Africa. In March 1948 succeeded, with several comrades, in escaping from the detention camp in Kenya and a week later reached Paris.
Returned to Israel aboard the Altalena on June 20, 1948. Moved to Jerusalem and was appointed commander of the Irgun battalion in the city.