In the Macedonian conquest of the east the Cadusii remained loyal to the Persians all the way up to Darius III's bitter end; we read of their cavalry fighting against Alexander at Gaugamela (331 BC) and of preparing to send reinforcements to the High King after the battle. But at the end they were subdued by Alexander's general Parmenion. In the subsequent Eastern wars they are mentioned as the allies of one or other party. After the division of Alexander's empire they became part of the Seleucid empire; in this context we read of them fighting for the Seleucids in the battle of Raphia against the Egyptians (217 BC), and their name is cited by Antiochus III's (223–187 BC) envoys at Aegium to the Achaeans as one of the many people under the sway of the Seleucids. But the crushing Romans victory at Magnesia started the disintegration of Seleucid power and the loss of all eastern territories. From this moment, little is known of Cadusian history; they seem to have been early submitted by the Parthians. As their allies Mark Anthony met them in 36 BC during his Parthian campaign; and two centuries later Caracalla in 216 repeated the campaign also entering in contact with the Cadusii. Excepting a forged letter by a Cadusian chief named Velonus to the Sasanian king Shapur I in 260, this is practically the last source that speaks of the Cadusii as an existing people; at this point they seem to vanish probably merging with other Caspian tribes. Modern day Talysh people generally identify themselves with the ancient Cadusians.