Dacian Wars [101-106]
The First Roman–Dacian War took place from 101 to 102 AD. The Kingdom of Dacia, under King Decebalus, had become a threat to the Roman Empire and defeated several of Rome's armies during Domitian's reign (81-96). Emperor Trajan was set on riding this threat to Rome's power and in 101 set out determined to defeat Dacia. After a year of heavy fighting, King Decebalus came to terms and accepted an unfavourable peace. When he broke these terms in 105, the Second Dacian War (105 - 106 AD) began.