When the Irgun proclaimed its "revolt" against the British in February 1944, he was put in charge of the Irgun activities, and was later appointed to the General Headquarters as chief operations officer. He was arrested on April 4, 1946, for his participation in the "Night of the Trains". He was sentenced, together with his comrades, to 15 years imprisonment, but was freed two years later in the Acre Prison break. He was sent clandestinely to Europe to organize action against British targets there, and on May 15, 1948, he returned home to take part in the 1948 Arab-Israeli War.
After Israel was established in 1948, He and Sara Rosenberg, a fellow Irgun activist, became the first couple to marry in the new Jewish state. He was chairman of the Wood Products Department of the Industrialists Association from 1949 to 1959, and owner of the “Ariah” Starch Factory until 1965. He was a member of the Directorate and Secretariat of the Herut Movement in 1960 and Head of its Organization Department in 1965. He was also the chairman of the Union of Irgun Soldiers between 1962 and 1980 and chairman of Acre and Jerusalem Prisoners Association in 1963.
In 1968 he became a member of Directorate of Gahal and later of Likud, and was the chairman of Directorate of Likud from 1970 to 1971. He was elected to the Knesset in 1973, 1977 and 1981. He was a member of the Economic Affairs, Foreign Affairs and Defense and State Control Committees.
He died in 1991. At his specific request, the Irgun emblem was engraved on his headstone. After his death, his daughter, Tzipi, entered the Israeli political scene, and has since become a prominent minister for Likud and later for Kadima.