 For his attempts to help Jewish refugees subvert the British immigration authorities, Sternberg was jailed for one month at Latrun jail, near Jerusalem.With the withdrawal of the British Mandate, Sternberg represented the Revisionist movement in the historic Declaration of the Establishment of the State of Israel on May 14, 1948.Following David Ben-Gurion's speech to the Vaad Leumi gathered at the then Tel-Aviv Museum of Art, Sternberg was one of the 37 signatories of the Declaration.