The Visigoths were the Western half of the Goths. The Eastern was the Ostrogoths. By the 4th century, the Visigoths were at the Danube River, infiltrating the Roman provinces across from it. Constantine the Great found them to be a nuisance, but they didn't really become a problem until the middle of the fourth century. In 410, they sacked Rome. Then, in 412, they went to Spain, where they remained until they were defeated by the Moors in the 8th century.