Theodoric (or Theoderic) the Great (454 30 August 526), also called Theodoric the Amal (Latin: Flvius Theodercus; Greek: , romanized: Theuderichos), was king of the Ostrogoths (471526), and ruler of the independent Ostrogothic Kingdom of Italy between 493 and 526, regent of the Visigoths (511526), and a patrician of the Eastern Roman Empire. As ruler of the combined Gothic realms, Theodoric controlled an empire stretching from the Atlantic Ocean to the Adriatic Sea. Though Theodoric himself only used the title 'king' (rex), some scholars characterize him as a Western Roman Emperor in all but name, since he ruled large parts of the former Western Roman Empire, had received the former Western imperial regalia from Constantinople in 497, and was referred to by the title augustus by some of his subjects.

As a young child of an Ostrogothic nobleman, Theodoric was taken as a hostage to Constantinople, where he spent his formative years and received an East Roman education (paideia). Theodoric returned to Pannonia around 470, and throughout the 470s he campaigned against the Sarmatians and competed for influence among the Goths of the Roman Balkans. The emperor Zeno made him a commander of the Eastern Roman forces in AD 483, and in AD 484 he was named consul. Nevertheless, Theodoric remained in constant hostilities with the emperor and frequently raided East Roman lands.

At the behest of Zeno, in 489 Theodoric attacked Odoacer, the king of Italy, emerging victorious in 493. As the new ruler of Italy, he upheld a Roman legal administration and scholarly culture and promoted a major building program across Italy. In 505 he expanded into the Balkans, and by 511 he had brought the Visigothic Kingdom of Spain under his direct control and established hegemony over the Burgundian and Vandal kingdoms. Theodoric died in 526 and was buried in a grand mausoleum in Ravenna. He lived on as the figure Dietrich von Bern in Germanic heroic legend.

Flavius Odoacer ( OH-doh-AY-sər; c. 431 – 493 AD), also spelled Odovacer or Odovacar (Ancient Greek: Ὀδόακρος, romanized: Odóakros), was a soldier and statesman of barbarian background, who deposed the child emperor Romulus Augustulus and became King of Italy (476–493). Odoacer's overthrow of Romulus Augustulus is traditionally seen as marking the end of the Western Roman Empire as well as Ancient Rome.Though the real power in Italy was in his hands, he represented himself as the client of the emperor in Constantinople, Zeno. Odoacer often used the Roman honorific patrician, granted by Zeno, but was referred to as a king (Latin: rex) in many documents. He himself used it in the only surviving official document that emanated from his chancery, and it was also used by the consul Basilius. Odoacer introduced few important changes into the administrative system of Italy. He had the support of the Roman Senate and was able to distribute land to his followers without much opposition. Unrest among his warriors led to violence in 477–478, but no such disturbances occurred during the later period of his reign. Although Odoacer was an Arian Christian, he rarely intervened in the affairs of the Trinitarian state church of the Roman Empire.

Likely of East Germanic descent, Odoacer was a military leader in Italy who led the revolt of Herulian, Rugian, and Scirian soldiers that deposed Romulus Augustulus on 4 September AD 476. The 12-year-old Augustulus had been declared Western Roman Emperor by his father Orestes, the rebellious general of the army in Italy, less than a year before, but had been unable to gain allegiance or recognition beyond central Italy. With the backing of the Roman Senate, Odoacer thenceforth ruled Italy autonomously, paying lip service to the authority of Julius Nepos, the previous Western emperor, and Zeno, the emperor of the East. Upon Nepos's murder in 480 Odoacer invaded Dalmatia, to punish the murderers. He did so, executing the conspirators, but within two years also conquered the region and incorporated it into his domain.

When Illus, master of soldiers of the Eastern Empire, asked for Odoacer's help in 484 in his struggle to depose Zeno, Odoacer invaded Zeno's westernmost provinces. The emperor responded first by inciting the Rugii of present-day Austria to attack Italy. During the winter of 487–488 Odoacer crossed the Danube and defeated the Rugii in their own territory. Zeno also appointed the Ostrogoth Theodoric the Great who was menacing the borders of the Eastern Empire, to be king of Italy, turning one troublesome ally against another. Theodoric invaded Italy in 489 and by August 490 had captured almost the entire peninsula, forcing Odoacer to take refuge in Ravenna. The city surrendered on 5 March 493; Theodoric invited Odoacer to a banquet of reconciliation. Instead of forging an alliance, Theodoric killed the unsuspecting king.