The fall of the Western Roman Empire in the 5th century was a complex process influenced by various factors. Weakening frontiers due to barbarian invasions, political instability and civil wars between rival generals, economic decline, corruption, and administrative inefficiency contributed to the empire's decline. Moreover, the division of the empire into Eastern and Western halves in the 4th century further strained resources and left the Western part vulnerable to external threats. The pressure of Germanic tribes, such as the Visigoths and Vandals, who eventually sacked Rome in 410 and 455, further weakened the empire's military strength and morale. Additionally, the rise of Christianity and its focus on spiritual matters over worldly pursuits may have also played a role in diverting resources and personnel from military defense. These factors, combined with the loss of key provinces and the failure of reforms, culminated in the final collapse of the Western Roman Empire in 476 AD, marking the end of the ancient world and the beginning of the Middle Ages.