Who Where the Early Anabaptists?
The Anabaptists (which literally means "re-baptizers") made the most radical attempt of the Reformation era to renew the church in central Europe. Whilst Anabaptism was a grass roots movement with diverse expressions often opposed by the establishment in its early development, its enduring legacy has included:
For more information about the history of Anabaptism, the Anabaptist Network in the UK has produced a wonderful set of materials online, called What is Anabaptism?. It's worth your time to take a look.
For a deep examination of the history of Anabaptism, the best resource online is the Global Anabaptist Mennonite Encyclopedia Online.