During the Hunnic Invastion of 451 Flavius Aetius ended the invastion of a ruler who was the leader of the Huns, Alans and what other groups of people?
Flavius Aetius Flavius Aetius (Latin: "Flavius Aetius" ; 391–454), "dux et patricius", commonly called simply Aetius or Aëtius, was a Roman general of the closing period of the Western Roman Empire. He was an able military commander and the most influential man in the Western Roman Empire for two decades (433-454). He managed policy in regard to the attacks of barbarian federates settled throughout the Western Roman Empire. Notably, he mustered a large Roman and allied ("foederati") army to stop the Huns in the Battle of the Catalaunian Plains, ending the devastating Hunnic invasion of Attila in 451.
Pleuratus III Pleuratus III (Ancient Greek Πλευράτος; ruled "c." 205 – 181 ) was an Illyrian king of the Ardiaean Kingdom. Pleuratus was the son of Scerdilaidas and nephew of the powerful Agron of Illyria. He bore the same name as his grandfather, Pleuratus II, and his son Gentius was the last king of the Ardiaean State. Pleuratus continued his father's pro-Roman policy even more decidedly, so much that his loyalty to Rome was well known, even to other dynasts. He managed to extend the boundaries of the Ardiaean State in the south when he was rewarded land annexed by Philip V. For doing nothing at all, he became the greatest of the Illyrian kings of the time all because of his loyalty to the Romans.