On March 15, 493, Theodoric the Great, leader of the Ostrogoths, defeated Odoacer and established control over Italy. Theodoric's reign marked a period of relative stability and prosperity in Italy, bridging Roman and Germanic cultures, but it also confirmed the end of Roman rule in the West.

On September 4, 476, Romulus Augustulus, the last Roman emperor of the West, was deposed by the Germanic chieftain Odoacer. This event is traditionally marked as the end of the Western Roman Empire. Odoacer declared himself ruler of Italy, signaling the transition from Roman to barbarian rule in the West.

The Vandals, led by King Genseric, sacked Rome on June 2, 455. This sack was more destructive than the Visigothic sack of 410, as the Vandals looted the city for two weeks. The event further demonstrated the weakening grip of the Western Roman Empire over its territories.

On August 24, 410, the Visigoths, led by King Alaric, sacked Rome. This was the first time in 800 years that Rome had fallen to a foreign enemy. The sack was a significant psychological blow to the Roman Empire and symbolized the declining power and influence of the Western Roman Empire.

In 395, following the death of Emperor Theodosius I, the Roman Empire was permanently divided into Eastern and Western halves. His sons, Arcadius and Honorius, ruled the Eastern and Western Roman Empires, respectively. This division weakened the Western Roman Empire, making it more vulnerable to external threats.

The Battle of Adrianople on August 9, 378, was a catastrophic defeat for the Roman Empire against the Goths. Emperor Valens was killed, and the Roman army suffered heavy losses. This battle is often seen as a pivotal moment that exposed the vulnerabilities of the Roman military and foreshadowed the empire's decline.

In 376, the Gothic tribes, fleeing the Huns, sought asylum within the Roman Empire. The Roman Emperor Valens allowed them to settle in the Balkans. This migration marked the beginning of significant internal pressures on the Roman Empire, as the Goths were not integrated well, leading to tensions.