 Adherents of British Israelism and Christian Identity both believe that the lost tribes migrated northward, over the Caucasus, and became the Scythians, Cimmerians and Goths, as well as the progenitors of the later Germanic invaders of Britain.The theory first arose in England, from whence it spread to the United States.During the 20th century, British Israelism was promoted by Herbert W. Armstrong, founder of the Worldwide Church of God.