The Dacian Wars (101–102, 105–106) were two military conflicts battled between the Roman Empire and Dacia amid Roman Emperor Trajan's guideline. The contentions were activated by the steady Dacian risk on the Danubian Roman Province of Moesia furthermore by the expanding requirement for assets of the economy of the Roman Empire.
Trajan turned his consideration regarding Dacia, a territory north of Macedon and Greece and east of the Danube that had been on the Roman motivation since before the times of Caesar when they vanquished a Roman armed force at the Battle of Histria. In AD 85, the Dacians swarmed over the Danube and looted Moesia and at first crushed the armed force that Emperor Domitian sent against them, however the Romans were successful in the Battle of Tapae in 88 and a détente was built up.
Ruler Trajan recommenced dangers against Dacia and, taking after an unverifiable number of fights, crushed the Dacian King Decebalus in the Second Battle of Tapae in 101. With Trajan's troops squeezing towards the Dacian capital Sarmizegetusa Regia, Decebalus yet again looked for terms. Decebalus remade his control over the next years and assaulted Roman armies again in 105. Accordingly Trajan again walked into Dacia, attacking the Dacian capital in the Siege of Sarmizegetusa, and destroying it. With Dacia subdued, Trajan in this way attacked the Parthian realm toward the east, his victories extending the Roman Empire to its most noteworthy degree. Rome's outskirts in the east were in a roundabout way represented through an arrangement of customer states for quite a while, prompting less immediate crusading than in the west in this period.
Since the rule of Burebista, broadly thought to be the best Dacian ruler—who ruled between 82 BC and 44 BC—the Dacians had spoken to a risk for the Roman Empire. Caesar himself had attracted up an arrangement to dispatch a battle against Dacia. The danger was decreased when dynastic battles in Dacia prompted a division into four (or five, contingent upon the source) independently administered tribal states after Burebista's passing in 44 BC. Augustus later clashed with Dacia after they sent agents offering their backing against Mark Antony in return for "solicitations", the nature of which have not been recorded. Augustus dismisses the offer and Dacia gave their backing to Antony. In 29 BC, Augustus sent a few reformatory campaigns into Dacia drove by Marcus Licinius Crassus (Marcus Licinius Crassus the Younger, otherwise called Marcus Licinius Crassus Dives, grandson of the celebrated around the world Marcus Licinius Crassus who put down the Spartacus slave defiance, and of the first Triumvirate with Julius Caesar and Gnaeus Pompey) that incurred overwhelming losses and clearly slaughtered three of their five lords. In spite of the fact that Dacian attacks into Pannonia and Moesia proceeded for quite a while notwithstanding the annihilation, the danger of Dacia had successfully ended.
At that point, following 116 years of relative peace along the Roman Empire, in the winter of 85 AD to 86 AD the armed force of King Duras drove by general Diurpaneus assaulted the Roman territory of Moesia, executing the Moesian representative Oppius Sabinus, a previous consul.