The rebellion spread rapidly through the whole country; enterprising leaders, two of whom bore the name of Bato, marched upon the Roman fortresses of Sirmium and Salona, ravaging the land as they went, while others harassed Macedonia with a large army. A bold troop of armed men threatened to invade Italy by way of Tergeste (Trieste); a disquieting agitation was abroad among the fierce Dalmatian and Sarmatian horsemen of the grassy steppes beyond the Danube; Roman traders were robbed and murdered. The alarm which took possession of the capital at these woeful tidings, and the military activity aroused throughout all Italy, sufficiently prove that Rome did not underestimate the danger that menaced her from the East. Discharged veterans were again enrolled in the legions, a slave tax was imposed to defray the cost of the war, peace was concluded with Marboduus, the prince of the Marcomanni, whom the Romans were on the point of attacking. This devastating war, according to Suetonius the most terrible since the Punic Wars, lasted for three years [7-9 A.D.]. Tiberius and his nephew Germanicus, the son of Drusus, marched through the length and breadth of Dalmatia and Pannonia--now tempting the fortune of war, now treading the paths of treachery, and fostering discord by negotiations. After many sanguinary battles Bato came to terms with the Romans for the surrender of the impregnable mountain stronghold of Anderium, not far from Salona, and went with his family to Ravenna, where Tiberius granted him a liberal allowance to the end of his days, in recompense for his desertion of his country’s cause. The fortress of Arduba, built on a steep height and protected by a turbulent river, held out longer; the most determined of the insurgents had thrown themselves into it, together with a large number of deserters. But its hour at length drew nigh. After the flower of the garrison, having made a sortie, had fallen in a sanguinary fight at close quarters, the survivors set fire to their homes and, with their wives and children, sought death in the flames or in the foaming torrent. The other towns then surrendered at discretion, and mute obedience settled once more on all the land between the Adriatic and the lower Danube. But the country was waste and inhabitants were few in the blood-sodden fields. The great river from source to mouth soon formed the northern boundary of the empire. The Thracian principalities were merged into the province of Mœsia. [Sidenote: [30 B.C.-14 A.D.]]