After two centuries of stability under Pax Romana, the Roman Empire began experiencing internal decay.The death of Marcus Aurelius in 180 CE marked the end of the Five Good Emperors period, leading to a succession of weak rulers.The Praetorian Guard, originally the emperor's protectors, began corrupting the imperial succession by selling the position to the highest bidder.To maintain power and pay the armies, emperors began debasing the currency, reducing its silver content and causing severe inflation.The once-efficient Roman bureaucracy gradually became corrupt and ineffective.This internal decay would set the stage for even greater challenges to come.As Rome's vast empire faced mounting economic challenges, maintaining its military became increasingly difficult.The empire had historically relied on conquest and slave labor for wealth, but territorial expansion had reached its limits.The massive cost of maintaining the army drained the imperial treasury, while tax collection became increasingly ineffective across the provinces.To address manpower shortages, Rome began recruiting foreign mercenaries who had less loyalty to the empire.Germanic tribes, which Rome had previously kept at bay through military strength and diplomatic payments, began penetrating the borders more frequently.The economic strain of maintaining frontier defenses while dealing with reduced tax revenue created a devastating cycle.The military's effectiveness declined as it relied more heavily on mercenaries and struggled to maintain proper training and equipment.These economic and military challenges would soon combine with external pressures to bring about even greater changes.By the final century, the Roman Empire faced overwhelming external pressures from multiple fronts.The empire had been divided into Eastern and Western halves for administrative purposes.The Hunnic invasion from the northeast pushed Germanic tribes into Roman territory en masse.The Western Empire gradually lost provinces to various invading peoples.Let's look at the key events that led to the empire's collapse.Finally, in 476 CE, the last Western Roman Emperor, Romulus Augustulus, was deposed by the Germanic leader Odoacer.This marked the traditional end of the Western Roman Empire, while the Eastern Empire continued as the Byzantine Empire.
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