High Quality Content by WIKIPEDIA articles! Operation Agatha (Saturday, June 29, 1946) sometimes called Black Shabbat or Black Saturday because it began on the Jewish sabbath, was a police and military operation conducted by the British authorities in the British Mandate of Palestine. Soldiers and police searched for arms and made arrests in Jerusalem, Tel-Aviv, and Haifa, and in several dozen settlements; the semi-official Jewish Agency was raided. The total number of British security forces involved is variously reported as 10,000, 17,000, and 25,000. About 2,700 individuals were arrested, among them Moshe Sharett. The British objectives included dissuading the Haganah and the Palmach, Lehi (Stern Gang), and the Irgun Tzvai Leumi, from undertaking further attacks against British troops and officials, as well as possibly dissuading a unilateral proclamation of a Jewish state, and bolstering morale.