The term 'Fifth-Century Warrior' refers to a warrior from the 5th century AD. The two crossword solutions for this term are Hun and ATTILA. The Huns were a nomadic people who originated in Central Asia and migrated to Europe in the 4th century AD. They were known for their fierce fighting style and were feared by many of the European nations they encountered. ATTILA was the leader of the Huns from 434 to 453 AD and is often referred to as the 'Scourge of God'. He was a powerful ruler who led his people in numerous campaigns against the Roman Empire and other European nations.