Mithridatic Wars
In 189 BC, Rome sent Gnaeus Manlius Vulso on an expedition against the Galatians, the Galatian War, defeating them. Galatia was henceforth dominated by Rome through regional rulers from 189 BC onward. Galatia declined, at times falling under Pontic ascendancy. They were finally freed by the Mithridatic Wars, during which they supported Rome.