Jewish communities have existed for long periods of time in regions throughout the world. While Judaic or Hebraic have long been considered discreet ethnic designations, the fact that one's Jewishness has more to do with religious belief than genetic history has confused this label over the centuries. It has been nearly 2000 years since Jews belonged to a single ethnicity, a result of the great Jewish Diaspora that followed the Jewish rebellions against Roman rule in the imperial province of Judea. When Jerusalem was sacked and the Jews still living in the Roman Empire were scattered across the globe, smaller Jewish communities flourished outside of the once sovereign territory of Canaan. By the Middle Ages, three major ethnic subgroups arose within the Jewish community and we still recognize those groups today. They are the Ashenazim, the Sephardim and the Mizrahim.