acceptance of Decebalus as king (rex amicus). He received a lump sum of money, annual financial stipends, craftsmen in trades devoted to both peace and war, and war machines to defend the empire's borders. The craftsmen were used by the Dacians to upgrade their own defences. Some historians believe this was an unfavorable peace and that it might have led to Domitian's assassination in September 96. Despite some co-operation on the diplomatic front with Domitian, Decebalus continued to oppose Rome. At the time, Rome was suffering from economic difficulties largely brought on by military invasions throughout Europe and in part due to a low gold content in Roman money as directed by Emperor Nero. Confirmed rumors of Dacian gold and other valuable trade resources inflamed the conflict, as did the Dacians' defiant behavior, as they were "unbowed and unbroken". However, other pressing reasons motivated them to action. Researchers estimate that only ten percent of barbarians such as Spanish and Gallic warriors had access to swords, usually the nobility. By contrast Dacia had rich resources of iron and copper and were prolific metal workers. A large percentage of Dacians owned swords, greatly reducing Rome's military advantage. Dacia sported 250,000 potential combatants, enough to enable an invasion. It was allied to several of its neighbors and on friendly terms with others that Rome considered enemies. Rome had no concrete defense policy and would not have been able to sustain a war of defense. As such, the new Emperor Trajan, himself an experienced soldier and tactician, began preparing for war. That Dacia was considered a substantial threat can be seen by the fact that Trajan withdrew troops from other borders leaving them dangerously undermanned. The first war After gaining the Senate's blessing for war, by 101 Trajan was ready to advance on Dacia. This was a war in which the Roman military's ingenuity and engineering were well demonstrated. The Roman offensive was spearheaded by two legionary columns, marching straight to the heart of Dacia, burning towns and villages en route. Trajan defeated a Dacian army at the Second Battle of Tapae. In the winter of 101-2, the Roman army under Trajan had been amassed near the later city of Nicopolis ad Istrum at the junction of the Iatrus (Yantra) and the Rositsa rivers in readiness for the attack by the Sarmatian Roxolani tribe from north of the Danube (who were allied to the