In 513 BC, on the nowadays Romanian territory, the tribal confederation of the Getae were encountered by Darius during his campaign in the Balkans. The Dacians resisted Darius, but were later defeated by the Roman Empire under Emperor Trajan in two campaigns stretching from 101 to 106, and the core of their kingdom became the Roman province of Dacia. The Gothic and Carpic campaigns in the Balkans during 238–256 forced the Roman Empire to reorganize a new Roman province of Dacia south of Danube, inside former Moesia Superior. In 271 the ancient Dacia became the Kingdom of the Goths until the end of the fourth century, when it was included in the Hunnic Empire. The Gepids and the Avars ruled Transylvania until eighth century, thence the Bulgars included Romania in their Empire until 1000. Th