Of the petty chiefs Mithridates was the first to persuade Pharasmanes to aid his enterprise by stratagem and force, and agents of corruption were found who tempted the servants of Arsaces into crime by a quantity of gold. At the same instant the Iberians burst into Armenia with a huge host, and captured the city of Artaxata. Artabanus, on hearing this, made his son Orodes the instrument of vengeance. He gave him the Parthian army and despatched men to hire auxiliaries. Pharasmanes, on the other hand, allied himself with the Albanians, and procured aid from the Sarmatæ, whose highest chiefs took bribes from both sides, after the fashion of their countrymen, and engaged themselves in conflicting interests. But the Iberians, who were masters of the various positions, suddenly poured the Sarmatæ into Armenia by the Caspian route. Meanwhile those who were coming up to the support of the Parthians were easily kept back, all other approaches having been closed by the enemy except one, between the sea and the mountains on the Albanian frontier, which summer rendered difficult, as there the shallows are flooded by the force of the Etesian gales. The south wind in winter rolls back the waves, and when the sea is driven back upon itself, the shallows along the coast are exposed.