 Between 1937 and 1939 he studied in England.After the outbreak of World War II he became a propagandist for the Haganah and Mapai and was the founder (with Galili and Gershon Rivlin) and editor of "Maarachot" (meaning both "systems" and "military campaigns"), a newspaper on military affairs, in 1939.In 1940 he published another newspaper, "Ashnav" ("porthole") with Berl Katznelson.