Sarmatian people

generate a one-sentence description for a given conceptual class.
# Response Format
Return only the sentence: "Description: [one-sentence description of the conceptional class]"

Class: Sarmatian people

The Sarmatian people were an ancient Iranian-speaking nomadic group who inhabited the Eurasian steppe north of the Black Sea from around the 5th century BCE to the 4th century CE, known for their skilled cavalry and influence on neighboring cultures, including the Romans.