Hunnic Empire

The Hunnic Empire (370-466 CE), sometimes called the Hunnish Empire, was an ancient tribal empire, at its peak reaching from Kazakhstan to the Alps. In 370 CE, the Hunnic leader Balamber established the Hunnic Empire, which devastated Europe for almost 100 years. In 445, Attila took power over the Huns and expanded Hunnic hegemony even further, until his devastating defeat at the Battle of Antioch during the Third Hunnic-Sasanian War, from 450-451 CE. After his death just two years later, Hunnic hegemony began to vanish until 466 CE, after the death of Dengizich, the empire collapsed once for all.

Before Attila (370-445 CE)
After the foundation of the empire under Balamber, the empire expanded west into Ukraine from 370-380. (for a detailed view, see https://www.youtube.com/watch?v=7YwwOzOaZfk, though leaders and borders could be slightly inaccurate). In 395, they invaded modern day Moldova under their new leaders Kursich and Basich. In 399-400 they launched their first invasion of the Sasanian Empire, which would result in the death of Kursich and Basich and the rise of their new leader Uldin. Also, from 400-402 CE, Uldin advanced far into the Carpathian Basin and Pannonia. From 404-405 CE, the Huns started the Second Hunnic-Sasanian War which resulted in a defeat once again, near Ctesiphon. At the same time, the Huns launched a successful invasion into Gothic-controlled eastern Thrace, occupying the city of Mithripolis as well. In 412 Charaton had risen to power, though a year later, Octar and Rugila took his place. The Sasanian Empire recaptured Mithripolis in 425, with a huge naval advantage. From 430-435 CE, the Hunnic leader was now only Rugila. Shortly after, Attila and Bleda had risen to power until 445, when only Attila would rule over the Huns.

Under Attila (445-453 CE)
After Attila took power in 445, he advanced to the Danube and invaded the Gothic Kingdom from 447-448, eventually defeating them in 448 CE. From 450-451, he launched a massive invasion, known as the Fourth Hunnic-Sasanian War. However, he was badly defeated at the Battle of Antioch (451) by the overwhelming Sasanian Cataphracts, with heavy losses on both sides. Shortly after, the Sasanians liberated Mithripolis. In 453, Attila died on a feast.

After Attila (453-466 CE)
After Attila's death, the Huns lost Greece. Soon after, losing another battle, known as the Battle of Nedao in 454 CE against the Gepids, which resulted in the death of Ellac, the oldest son of Attila. After this, Dengizich and Ernak took power. From 458-461 CE, the Huns lost more land in Pannonia and the Carpathian Basin. In 463 the Huns were also dealing with the arrival of more Oghur Turkic-speaking tribes from the East, including the Oghurs, Saragurs, Onogurs, and the Sabirs. In 463, the Saragurs defeated the Huns and gained dominance in the Pontic region. Finally, in 466 CE, Dengizich attempts a last all-out invasion against the Sasanians, which would ultimately end in his death and the collapse of the Hunnic Empire.

List of Hunnic Rulers
These are the names and reign dates.

Balamber (370-395 CE)

Joint rule of Kursich and Basich (395-400 CE)

Uldin (400-412 CE)

Charaton (412-413 CE)

Joint rule of Octar and Rugila (413-430 CE)

Rugila (430-435 CE)

Attila and Bleda (435-445 CE)

Attila (445-453 CE)

Ellac (454-454 CE)

Joint rule of Dengizich and Ernak (454-466 CE)

Source
https://en.wikipedia.org/wiki/Huns