Dacians), and resulted in a Roman victory for which the city was named. In 102 Decebalus chose to make peace once it became clear that the Roman advance towards Sarmizegetusa was unstoppable. The war had concluded with an important Roman victory and with the establishment of a garrison and an acting governor at Sarmizegetusa. A bridge later known as Trajan's bridge was constructed across the Danube at Drobeta to assist with the legionaries' advance. This bridge, probably the biggest at that time and for centuries to come, was designed by Apollodorus of Damascus and was meant to help the Roman army advance faster in Dacia in case of a future war. According to the peace terms, Decebalus got technical and military reinforcement from the Romans in order to create a powerful allied zone against the dangerous possible expeditions from the northern and eastern territories by hostile migrating peoples. The resources were instead used to rebuild Dacian fortresses and strengthen the army. Soon thereafter Decebalus turned against the Romans once again. The second war Following the first war, Decebalus complied with Rome for a time, but was soon inciting revolt among tribes against them and pillaging Roman colonies across the Danube. True to his intrepid and optimistic nature, Trajan rallied his forces in AD 105 for a second war. Like the first conflict, the second war involved several skirmishes that proved costly to the Roman military. Faced with large numbers of allied tribes, the legions struggled to attain a decisive victory, resulting in a second temporary peace. Eventually, goaded by the behavior of Decebalus and his repeated violations of the treaty, Rome again brought in reinforcements, took the offensive and prevailed in 105. The next year they gradually conquered the mountain fortress system that surrounded the Dacian capital, Sarmizegetusa. The final decisive battle took place near the walls of Sarmizegetusa, presumably during the summer of 106, with the participation of the legions II Adiutrix and IV Flavia Felix and a detachment (vexillatio) from VI Ferrata. The Dacians repelled the first attack, but the Romans, helped by a treacherous local nobleman, found and destroyed the water pipes of the Dacian capital. Running out of water and food the city fell and was razed. Decebalus fled, but was followed by the Roman cavalry and committed suicide rather than submit. Nevertheless, the war went on. Thanks to the treason of a confidant of the