The Battle of Carnuntum took place in 170 A.D. during the Marcomannic Wars. In the spring of 170 A.D. swarms of German warrior bands attacked Roman provinces along the Danube River. In furtherance of this endeavor, and for mutual protection, the king of the Marcomanni, Ballomar, had formed an alliance with the Quadi tribe. Roman Emperor Marcus Aurelius with his son-in-law and chief military adviser Tiberius Claudius Pompeianus crossed the Danube River to drive back the raiders. The Romans and Germans met outside Carnuntum in Upper Pannonia, which was the headquarters for the 14th Legion. The Roman army was inexperienced and outmatched, and the ensuing battle was a disaster for the Romans. Although the legions fought hard and bravely, they were no match for the Germanic warriors. 20,000 Rom