The american breeders association and the eugenics research association broke caucasians into how many different "races."

According to the association, they separate caucasians into Nordic, Germanic and Anglo-Saxon

Nordic Caucasians resided in the Scandanavian region (such as Denmark, sweden, and Norway), Germanic Caucasian most commonly found in middle to eastern Europe, and Anglo-Saxon most commonly resied in western and southern europe

The Caucasian race was divided into three separate races. They consist of the Nordic from the Scandinavian region, the Germanic from Eastern Europe and the Anglo-Saxon races from Western Europe.