Bahr served from 1972 until 1990 as a member of the German Bundestag. He was directly elected in 1976 and 1980 as the representative of the Schleswig-Flensburg electoral district; in the remaining elections, he was elected from the SPD's party list. Bahr also served as chairman of the Sub-Committee for Disarmament and Arms Control. In 1980, Bahr became a member of the Independent Commission for Disarmament and Security under the chairmanship of Swedish politician Olof Palme. The Commission published its findings in a 1982 report titled “Common Security”. Among the report's recommendations was the concept of a nuclear-free corridor in Central Europe.