In particular they advocated voluntary adult baptism and in the context of intense persecution came to hold a belief in pacifism and separation from the world. Two major streams of Anabaptists emerged from the original Swiss Radical Reformers. The Swiss-South German Anabaptists migrated to the Palatinate and then to America in the 18th century.
A likeness of Menno Simons, published in Ludwig Bechstein’s Zweihundert Bildnisse und Lebensbeschreibungen berühmter deutscher Männer (1854). Image credit: Wikipedia Commons