As the commander of the Alan mercenaries , he was the only Byzantine leader to resist the German crusaders in a clash at Prousenos near Philippopolis in 1189 .
Theodore fought with limited success under Isaac II Angelos .
As the commander of the Alan mercenaries , Theodore was the only Byzantine Theodore to resist the German crusaders in a clash at Prousenos near Philippopolis in 1189 .
Theodore fought with limited success under Isaac II Angelos .