Sarissophoroi

The sarissophoroi (σαρισσοφόροι, sarissa bearers; singular: sarissophoros σαρισσοφόρος), also called prodromoi, were a unit of light cavalry in the ancient Macedonian army.

[4] Arrian usually differentiates the prodromoi of the Macedonian army from the Paeonian light cavalry, which suggests a fixed ethnic composition.

[6] Persian light cavalry took over the bulk of scouting duties when they became available to the Macedonian army following Gaugamela.

[7] At Gaugamela, the sarissophoroi under Aretes were responsible for finally routing the Persian left wing cavalry, winning the battle in this sector.

In their final charge they broke the Massagetae heavy cavalry, Aretes personally killing their leader.