The Western Roman Empire fell in the late 5th century due to a combination of internal weaknesses and external pressures. Political instability, economic troubles, and military defeats weakened the empire, making it difficult to maintain control over its vast territories. In 476 AD, the last Roman emperor, Romulus Augustulus, was deposed by the Germanic leader Odoacer, marking the traditional date for the fall. This event symbolized the end of ancient Rome's dominance in the West and led to the rise of various barbarian kingdoms in Europe.