Galatia, in the settlement of 64 BCE,…

Galatia, in the settlement of 64 BCE, becomes a client-state of the Roman empire, the old constitution disappears, and three chiefs (wrongly styled "tetrarchs") are appointed, one for each of the region's Gaulish tribes.

But this arrangement soon gives way before the ambition of one of these chiefs, Deiotarus, the contemporary of Cicero and Julius Caesar, who makes himself master of the other two chiefdoms and is finally recognized by the Romans as 'king' of Galatia.