 The Achaeans never allowed the horses to drink from that river for all of them were stolen by Diomedes and Odysseus shortly after their arrival.In a different story (attributed to Pindar), Rhesus fights so well against the Achaeans that Hera sends Odysseus and Diomedes to kill him secretly at night.Another version (Virgil and Servius) says that Rhesus was given an oracle that claims he will be invincible after he and his horses drink from the Scamander.