Latest / The Achaemenid Empire: Persia's Golden Age of Power — Fexingo History / The Immortals: Persia's Elite Guard and Their Legacy
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- Lucas: Luna, we've spent a lot of time on Achaemenid diplomacy, infrastructure, and sieges, but I realised we haven't done a deep dive on the most famous Persian fighting force of all: the Immortals. Luna: The Immortals — I've heard the name, but what exactly made them so special? Lucas: Well, the Greek term is 'Athanatoi', which literally means 'the undying'. Herodotus says they were a corps of exactly 10,000 elite infantrymen, and whenever one was killed or retired, he was immediately replaced — so the number never dropped. That gave the illusion that they were immortal. Luna: So it's a kind of psychological warfare, too — the enemy sees a force that never seems to shrink. Lucas: Exactly. And the unit seems to have been created by Cyrus the Great, probably formed from the best soldiers of the Persian and Median tribes. They were the king's personal guard, his shock troops, and they would have been the most heavily armed and best-paid soldiers in the empire. Lucas: Herodotus describes their appearance in some detail: they wore soft felt caps called tiaras, a purple tunic over scale armour, and trousers — which the Greeks found exotic. They carried a short spear, a bow, and a sword, and their shields were made of wicker, often with a golden apple or pomegranate on the butt of the spear. Luna: That's the 'apple bearers' I've heard about, right? Lucas: Yes — the 'Mêlophoroi' in Greek, or apple bearers. Some historians think the apple bearers were a separate unit of the royal bodyguard, while others say it was just the name for the Immortals themselves. The golden apple counterweight on the spear butt became their signature. Lucas: Now, there's a fascinating debate about the name 'Immortals'. Some scholars argue that Herodotus confused the Persian word 'Anûšiya', which might mean 'companion' or 'follower', with 'Anauša', meaning 'immortal'. So the whole 'undying' idea could be a misunderstanding. Luna: Wait, so the Immortals might never have called themselves that? Lucas: Exactly right. The Old Persian term for the royal guard was something like 'Anûšiya' — 'companions' — but the Greeks heard 'Anauša' and thought 'immortal'. It's a pretty convincing linguistic argument. Still, the concept of a constantly replenished elite unit is attested in other sources, like Xenophon's Cyropaedia, which describes a 10,000-man guard under Cyrus. Lucas: So whether or not they were literally called Immortals, the idea of a fixed-number elite corps seems to be historical. Luna: How did they perform in battle? I know Thermopylae is famous, but they weren't exactly successful there. Lucas: That's a great point. At Thermopylae in 480 BCE, the Immortals were the troops who finally outflanked the Greeks via the mountain path. But they took heavy losses against the Spartan-led defenders. Later, at Plataea in 479 BCE, the Immortals' commander Mardonius was killed, and the unit was reportedly wiped out. That was a huge blow, but the corps was quickly reconstituted. Lucas: You have to remember, the Immortals were elite, but they weren't superhuman. They were professional soldiers in an era when most Greek hoplites were citizen militias. They had better equipment, training, and logistical support. But they faced a determined Greek alliance that had developed its own effective tactics. Luna: So they were more of a status symbol and a royal guard than a battlefield trump card? Lucas: Partly. They served multiple roles: bodyguard to the king, palace police, and front-line infantry in major campaigns. On the battlefield, they were often held in reserve and committed at critical moments. They were also used to suppress rebellions within the empire. Their mere presence could intimidate provincial satraps. Lucas: And they were lavishly equipped. Gold and silver adorned their weapons and armour. They had their own baggage train of camels and mules. When the king travelled, they marched with him, forming a visible display of power. Luna: I've also heard about the 'Kiss of the King' — was that part of their ceremonial role? Lucas: Yes — the right to kiss the king was a privilege reserved for high nobles and favoured officers. The Immortals would have been close enough to the king to receive that honour. It's a reminder that their status was as much about court ritual as combat. Lucas: Now, the Immortals also feature in later Persian dynasties. The Seleucids and Parthians maintained similar elite units, and the Sasanians had their own 'Immortals' — though the direct lineage is unclear. The idea of an elite 10,000-man corps persisted for centuries. Luna: What happened to the original Immortals when Alexander conquered Persia? Lucas: They fought against Alexander at Issus and Gaugamela. After Darius III's death, many of them were incorporated into Alexander's army. Alexander actually kept a Persian guard unit of his own, modelled on the Immortals. He even appointed a Persian commander, which caused friction with his Macedonian veterans. Lucas: So in a way, the Immortals outlived the Achaemenid Empire, absorbed into the new Hellenistic world. But their most famous incarnation is definitely the Achaemenid one. Luna: And in popular culture, they've become this iconic image of Persian power — the 300 movie, games like Assassin's Creed. Lucas: Absolutely, though those portrayals take a lot of liberties. The Immortals in Frank Miller's 300 wear golden masks and are monstrous — in reality, they were highly disciplined, well-dressed soldiers, not zombies. But the core idea of a relentless, unbreakable elite force is rooted in history. Lucas: If you've been stepping into history with us episode by episode, you'll know we try to separate fact from fiction. And it's thanks to listeners like you that we can keep doing that. A couple of dollars a month is genuinely what keeps these going — buy me a coffee dot com slash fexingo, if you've gotten something out of them. Luna: Yeah, every bit helps keep the show ad-free and focused on the stories we love. Lucas: So to wrap up the Immortals: they were more than just a fighting unit — they were a symbol of the permanence and unity of the Achaemenid Empire. Their replenishment policy reflected the empire's vast resources and its ability to project stability. Even after defeats, they were rebuilt, embodying the idea that the Persian king's power was inexhaustible. Luna: That's a powerful legacy. And now I'm curious about the daily life of an Immortal — what was training like, how were they recruited? Lucas: We don't have direct Persian sources on that, but from Greek accounts and later parallels, we can infer they were drawn from the best of the Persian and Median nobility. Training probably began in childhood, with horsemanship, archery, and spear-fighting. They would have lived in barracks near the palace, with strict discipline and regular drills. Lucas: Their loyalty was secured by high pay, land grants, and direct access to the king. They were also likely bound by personal oaths of fealty. In a way, they were the empire's Praetorian Guard, but with less political interference — at least until the late period. Luna: Were there any famous Immortals we know by name? Lucas: Few individual names survive. One is Mardonius, the commander at Plataea, though he was a general over the whole army, not just the Immortals. Another is Hydarnes, who led the Immortals in the mountain flank at Thermopylae. But most remain anonymous, which is fitting for a unit that emphasised the collective over the individual. Lucas: And that's part of their mystique — they were the faceless, relentless force that upheld the Great King's authority. For nearly two centuries, they were the iron core of the Persian army. Luna: It's amazing how much we can piece together from Greek sources, even with all their biases. Lucas: Indeed. And the archaeological record adds a little — reliefs at Persepolis show soldiers in Median and Persian dress, carrying spears with apple-shaped butts, and bow cases. Those are probably our best visual evidence of what the Immortals looked like. Their legacy endures in stone, in text, and in the imagination of later cultures.