During the 4th and 5th centuries CE, Visigoths and Vandals militarily organized themselves to sufficiently challenge and sack Rome in 410 AD and again in 455 AD. Then in 476 AD, the last Roman emperor was deposed by the Germanic warrior Odoacer, an event which effectively ended Roman predominance in Western Europe. Germanic tribes eventually overwhelmed and conquered the ancient world. That military transition was additionally spurred by the arrival of the Vikings from Scandinavia in the 8th to 10th centuries, giving rise to modern Europe and medieval warfare.