R. Baruch Joseph Sack (1887-1949) was born in Krasilov. He studied with his cousin, R. Shalom Bush of Krasilov, and his father-in-law, R. David Solomon Rabinowitz (Admor of Kobrin). He immi­grated to the Land of Israel in 5673 [1913]. Sack was in the process of establishing a settle­ment for Hasidim when World War I broke out and he was exiled to Egypt. Sack remained there until he was brought by Hasidim of Kobrin to America. At first he served as the rabbi of Anshei Kobrin on New York's Lower East Side, but his followers later estab­lished a synagogue for him, Degel Mahane Yisrael, in Brooklyn.