The Haumavarga branch was conquered by Persia in 545 BCE, though Cyrus II was killed in battle with their Massagetes subtribe.  
Herodotus mentions a diplomatic incident in which this people caused the Medean-Lydian Wars, and their interference under their king Madyas during Cyaxares' siege of Nineveh led to their namesake interregnum.  Originally from the area around Pazaryk, their move west displaced tribes like the Urarteans and Cimmerians.  The Haumavarga branch was conquered by Persia in 545 BCE, though Cyrus II was killed in battle with their Massagetes subtribe.  Eventually displaced by the Sarmatians, FTP, name this ancient nomadic people of Central Asia named after a curved tool.
Herodotus mentions a diplomatic incident in which this people caused the Medean-Lydian Wars, and their interference under their king Madyas during Cyaxares' siege of Nineveh led to their namesake interregnum.  
Scythians