People living along it were conquered in a war against (*) Decebalus, in which Trajan conquered the Dacians.
The city of Singidunum along this river was the capital of the Celtic Scordisci [score-DISS-kee]. About 20 percent of burials from the 8th century found along this river and its tributaries have East Asian features, possibly indicating Avar origins. This river's mouth was located in the province of Scythia Minor. A Roman fleet patrolled this river after a campaign of conquest during which Apollodorus of Damascus built a bridge over it. People living along it were conquered in a war against (*) Decebalus, in which Trajan conquered the Dacians. This river was the northern border of the Eastern Roman, or Byzantine empire. For 10 points, name this second longest river in Europe, which flows into the Black Sea.
The city of Singidunum along this river was the capital of the Celtic Scordisci [score-DISS-kee].
Danube River