Алия Бет
The following year the founders of the kibbutz were joined by a group which had formed in Haifa, and in the 1930s were joined by Galician Hashomer Hatzair members from Aliyah Bet. During the Mandate era, Mizra hosted the Palmach headquarters, until it was discovered by the British authorities in Operation Agatha of 1946. The kibbutz also has a museum portraying the history of the Yishuv.