stylistic:tone, information:extraction
Conflict with Rome

Burebista 's Dacian state was powerful enough to threaten Rome, and Caesar contemplated campaigning against the Dacians. Despite this, the formidable Dacian power under Burebista lasted only until his death in 44 BC. The subsequent division of Dacia continued for about a century until the reign of Scorilo. This was a period of only occasional attacks on the Roman Empire's border, with some local significance.

The unifying actions of the last Dacian king Decebalus (ruled 87–106 AD) were seen as dangerous by Rome. Despite the fact that the Dacian army could now gather only some 40,000 soldiers, Decebalus' raids south of the Danube proved unstoppable and costly. In the Romans' eyes, the situation at the border with Dacia was out of control, and Emperor Domitian (ruled 81 to 96 AD) tried desperately to deal with the danger through military action. But the outcome of Rome's disastrous campaigns into Dacia in AD 86 and AD 88 pushed Domitian to settle the situation through diplomacy.

Emperor Trajan (ruled 98–117 AD) opted for a different approach and decided to conquer the Dacian kingdom, partly in order to seize its vast gold mines wealth. The effort required two major wars (the Dacian Wars), one in 101–102 AD and the other in 105–106 AD. Only fragmentary details survive of the Dacian war: a single sentence of Trajan's own Dacica; little more of the Getica written by his doctor, T. Statilius Crito; nothing whatsoever of the poem proposed by Caninius Rufus (if it was ever written), Dio Chrysostom 's Getica or Appian 's Dacica. Nonetheless, a reasonable account can be pieced together.

In the first war, Trajan invaded Dacia by crossing the river Danube with a boat-bridge and inflicted a crushing defeat on the Dacians at the Second Battle of Tapae in 101 AD. The Dacian king Decebalus was forced to sue for peace. Trajan and Decebalus then concluded a peace treaty which was highly favourable to the Romans. The peace agreement required the Dacians to cede some territory to the Romans and to demolish their fortifications. Decebalus' foreign policy was also restricted, as he was prohibited from entering into alliances with other tribes.

However, both Trajan and Decebalus considered this only a temporary truce and readied themselves for renewed war. Trajan had Greek engineer Apollodorus of Damascus construct a stone bridge over the Danube river, while Decebalus secretly plotted alliances against the Romans. In 105, Trajan crossed the Danube river and besieged Decebalus' capital, Sarmizegetusa, but the siege failed because of Decebalus' allied tribes. However, Trajan was an optimist. He returned with a newly constituted army and took Sarmizegetusa by treachery. Decebalus fled into the mountains, but was cornered by pursuing Roman cavalry. Decebalus committed suicide rather than being captured by the Romans and be paraded as a slave, then be killed. The Roman captain took his head and right hand to Trajan, who had them displayed in the Forums. Trajan's Column in Rome was constructed to celebrate the conquest of Dacia.

The Roman people hailed Trajan's triumph in Dacia with the longest and most expensive celebration in their history, financed by a part of the gold taken from the Dacians. For his triumph, Trajan gave a 123-day festival (ludi) of celebration, in which approximately 11,000 animals were slaughtered and 11,000 gladiators fought in combats. This surpassed Emperor Titus's celebration in AD 70, when a 100-day festival included 3,000 gladiators and 5,000 to 9,000 wild animals.