The territory of today's Romania was inhabited since at least 513 BC by the Getae or Dacians, a Thracian tribe. Under the leadership of Burebista (82-44 BC), the Dacians became a powerful state which threatened even the regional interests of the Romans. Julius Caesar intended to start a campaign against the Dacians, but was assassinated in 44 BC. A few months later, Burebista shared the same fate, assassinated by his own noblemen. His powerful state was divided in four and did not become unified again until 95, under the reign of the Dacian king Decebalus. The Dacian state sustained a series of conflicts with the expanding Roman Empire, and eventually, only 14% of Dacia was conquered by the romans in AD 106 by the Roman emperor Trajan, who defeated Decebalus. Faced by successive invasions of the Goths and Carpi, the Roman administration withdrew in 271.