Ye, it was the so-called Scyths-plowmen (or whatever it is in English, sorry). But they were Thracian in origin subjected by the Scyths and culturally influenced by them. They did not. They were pure 100% nomads. Maybe some of their subjected peoples did.
You know since 18-th century the Polish toyed with the idea that they originated from the Sarmations . The Russian in their turn pleased themselves that their ancestors were the Scyths.
The reason was simple - it was cool to have such ancient and glorious ancestors. You know that the Slavs were not too 'ancient' and they were hardly glorious in antiquity.
But the 20-th century archeology proved with 100% certainty that it had nothing(!) to do with reality. The nomad peoples of Iranian origin did not move Northward from the Black Sea coast.
There was a great mess in antiquity concerning the Scythians. First any nomads of somewhat Iranian origin could be called that name by the Greeks. And they were somehow right for they were most probably closely related.
The there was a geographical principle - any(!) tribe who happened to live in 'Scythia' (Northern Black Sea coast very roughly) could be called Scyths (even when the Scyths themselves had been long gone). So the Eastern Romans often called the Goths, the Rus and even some Pechenegs or whatever - 'the Scyths'.
Go figure!
The Scyths and Sarmatians were one and the same people. The Sarmatians were just a 'wilder' version of the Scyths. And the Sarmatians were extremely closely related to the Alans. And the modern-day Ossetins are the descendants of the Alans.
So we do have a Scythian small state in Eurasia. Though they are not independent states. At least so far. Their two republics are included in Russia and Georgia.