Bohemians are inhabitants of Bohemia ,German: Boehmen.The territory of Bohemia lies entirely in Germania. After the Roman empire break-up and the regaining of Germanic lands from Roman occupation Bohemia was a part of the
Frankish then
Holy Roman Empire until 1804/6.
After WWI Bohemia was seperated by western powers and the German Bohemians were gradually forced out of their homeland. The land was completely taken over by the Slavic Czech people.