<human>:  Why did the Romans lose at the Battle of Nicopolis?
<bot>: That’s a good question. The Romans lost because they were outnumbered by the Dacians. Dacia was a large kingdom located in what is now Romania. The Dacians were skilled warriors who fought in a phalanx formation, which made them extremely tough to beat. They had a large cavalry force that could ride fast and hit hard. The Romans had a smaller army, and they were not as well trained as the Dacians.