Nahal Brigade
In his youth, Freiberg was a prominent member of the Socialist Zionist youth movement Ichud Habonim and was active in the Melbourne University Jewish Students Society. In 1982, he emigrated to Israel and worked at kibbutz Tel Katzir. In Israel, he Hebraicized his surname from Freiberg to Regev. He served as a combat soldier in the Nahal Brigade of the Israel Defense Forces.