As a youth, this son of Segimer served as an auxiliary in the army he would later oppose.  
He covered his face in blood to avoid being recognized by his opponent's army after suffering a major defeat in the Valley of the Maidens.  At that battle on the Idistaviso plain, his wife Thusnelda was captured.  Seven years earlier, he had won a major victory in the aftermath of which a number of prisoners were nailed to trees while still alive.  As a youth, this son of Segimer served as an auxiliary in the army he would later oppose.  His great victory was achieved near Detmold, and led to the suicide of a former governor of Syria who had married the grand-niece of Augustus.  FTP, name this chief of the Cherusci, who in 9 AD defeated three Roman legions led by Varus in the Teutoberg Forest.
He covered his face in blood to avoid being recognized by his opponent's army after suffering a major defeat in the Valley of the Maidens.  
Arminius or Hermann