Decius found the Goths engaged before Nicopolis, one of the many monuments of Trajan’s victories. On his approach they raised the siege, but with a design only of marching away to a conquest of greater importance, the siege of Philippopolis, a city of Thrace, founded by the father of Alexander, near the foot of Mount Hæmus. Decius followed them through a difficult country, and by forced marches; but when he imagined himself at a considerable distance from the rear of the Goths, Cniva turned with rapid fury on his pursuers. The camp of the Romans was surprised and pillaged, and, for the first time, their emperor fled in disorder before a troop of half-armed barbarians. After a long resistance, Philippopolis, destitute of succor, was taken by storm. A hundred thousand persons are reported to have been massacred in the sack of that great city. Many prisoners of consequence became a valuable accession to the spoil; and Priscus, a brother of the late emperor Philip, blushed not to assume the purple, under the protection of the barbarous enemies of Rome. The time, however, consumed in that tedious siege, enabled Decius to revive the courage, restore the discipline, and recruit the numbers of his troops. He intercepted several parties of Carpi, and other Germans, who were hastening to share the victory of their countrymen, intrusted the passes of the mountains to officers of approved valor and fidelity, repaired and strengthened the fortifications of the Danube, and exerted his utmost vigilance to oppose either the progress or the retreat of the Goths. Encouraged by the return of fortune, he anxiously waited for an opportunity to retrieve, by a great and decisive blow, his own glory, and that of the Roman arms.