Attila the Hun was born in 406. After being a child hostage of the Romans for much of his youth, Attila would ascend to the throne with this brother Bleda. Attila soon killed Bleda and took absolute power over the Huns.
Under Attila, the Huns would constantly raid the outskirts of Byzantine Empire. At one point, Attila engaged with Aetius of the Romans at the Battle of Chalons. Attila lost the battle, but still was able to make it to the gates of Rome but would be turned back after the Pope urged him not to push forward.
For more information, read:The Oxford Book of Military Anecdotes by Max Hastings
History Resource Center World: Attila the Hun
http://school.eb.com/all/eb/article-9011178?query=Attila&ct=nullMilitary History Podcast is sponsored by Armchair General Magazine