Memnon of Rhodes (Greek: Μέμνων ὁ Ῥόδιος; c. 380 – 333 BC) was a prominent Rhodian Greek commander in the service of the Persian Achaemenid Empire. Related to the Persian aristocracy by the marriage of his sister to the satrap Artabazus II, together with his brother Mentor he served the Persian king for most of his life, and played an important role during the invasion of Alexander the Great and the decades before that.
Carl Otis Schuster notes that though often inaccurately described as "simply a mercenary", Memnon was arguably the toughest defender of the Persian Empire Alexander had to face, and was nearly successful in putting a halt to him.
Not much is known about Memnon's early life. r. 404–358), with Memnon and Mentor as his generals. When the revolt failed, Memnon and Artabazos II fled to Pella, the capital of Macedonia, whereas Memnon's brother Mentor fled to Egypt. Eventually Mentor returned to Persian service in about 343 BC.Born in c. 380 BC in Rhodes, Memnon would serve the Persian Empire for most of his life. He started his career in 358 by serving together with his brother Mentor under the Persian satrap (governor) Artabazos II of Phrygia. During his service to the Persian satrap, Artabazos allowed Memnon to marry his daughter Barsine. In about 358 BC, Artabazos staged a rebellion against the then ruling Persian Achaemenid king Artaxerxes II (
During his exile in Macedon, Memnon got acquianted with Philip II and the young prince Alexander (later Alexander the Great), who was seven years old at the time. According to Plutarch, Memnon and Alexander had lengthy discussions, with Alexander reportedly having keen interest in Persia's military strength and tactics, amongst others.Though Schuster notes that the details of the conversations between Memnon and Alexander are difficult to verify, he does add that Memnon managed to get a proper impression of Philip II as a ruler, military leader and diplomat during his time in Pella. Moreover, it convinced him of Philip II's intentions to invade Persia, and he got a proper realization of the deep-seated Greek dissatisfaction vis-a-vis the Macedonian hegemony over Greece, including the political issues that came along with it for the Macedonians.
Through the "influence" of his brother, after a stay of about three to four years in Macedon, Memnon re-entered the Persian service, "with a clear understanding of Macedonia's military capabilities".
When Mentor died in c. 340 BC, Memnon married his widow Barsine. In 339 BC, Memnon helped defending Byzantium against an assault by Philip II. r. 336–330 BC) to orchestrate a rebellion in Greece. Initially hesitant, Darius made Memnon the commander of the western satrapies (provinces) after the defeat at the Battle of Granicus. During the defense of Halicarnassus, Memnon was the leading commander, and nearly defeated Alexander's attack. He then started using the empires naval superiority against Alexander and started negotiations with Sparta in order to take the war to mainland Greece. He began a campaign to capture the Aegean islands using the Persian fleet and led a direct assault on Macedonia, while Alexander was resting at Phaselis. Memnon managed to capture the island of Chios and most of Lesbos. Demosthenes, after hearing of Memnon's successes, began to prepare Athens for a revolt against Alexander, along with other Greek cities, while Sparta began to prepare for war. By a stroke of fortune for Alexander, Memnon died during the siege of Mytilene, after transferring command to his nephew, Pharnabazus. Memnon's widow Barsine later became a mistress to Alexander and bore him a son, Heracles. After Alexander's death, Heracles contended for the throne with Nearchus' initial support (who himself had married Barsine's daughter by Mentor). Their bid met insufficient support, and Barsine and Heracles were murdered in 309 BC by Polyperchon.When Philip's son Alexander invaded the Persian Achaemenid Empire, Memnon, aware of the political issues the Macedonians dealt with, urged king Darius III (
Many scholars maintain that had Memnon's campaign been successful, Alexander would have had difficulty in continuing his campaign in Asia, and might have soon been defeated. Memnon's naval campaigns and the uprising he orchestrated in Sparta posed the greatest danger to Alexander since he had become king.Schuster notes that if Memnon hadn't died at Mytilene, "Alexander might have been forced to abandon Asia Minor and return home to defend his throne". Thus, when Alexander realized he had nearly been defeated, he decided to invade Achaemenid Phoenicia first before moving into the empires interior. It was not until after the major Persian defeat at the Battle of Issus that Memnon's strategy was revitalised and finally put into action, but by then the advantage had been lost, and Alexander showed himself willing to forfeit Greece if necessary in favor of his greater goals.