Why did the Roman Empire fall in the West?

The fall of the Western Roman Empire was a long decline rather than a single collapse. The empire faced frequent civil wars, short-lived emperors, heavy military spending, inflation, and pressure from Germanic groups moving across its frontiers. In 410 CE Rome was sacked by the Visigoths, and in 455 CE by the Vandals, showing how weakened the West had become. Finally, in 476 CE, the last western emperor, Romulus Augustulus, was deposed by Odoacer. The Eastern Roman Empire survived for nearly a thousand more years as the Byzantine Empire.