Antony

And now the king of the Medes had a quarrel with Phraortes the Parthian; it arose, as they say, over the Roman spoils, but it made the Mede suspicious and fearful that his dominion would be taken away from him. For this reason he sent and invited Antony to come, promising to join him in the war with his own forces.

Antony, accordingly, was in high hopes. For the one thing which he thought had prevented his subjugation of the Parthians, namely, his lack of a large number of horsemen and archers on his expedition, this he now saw supplied for him, and he would be granting and not asking a favour. He therefore made preparations to go up again through Armenia, effect a junction with the Mede at the river Araxes, and then prosecute the war.