Warhammer 40,000: The story of the Primarchs who changed the galaxy

Warhammer 40,000 is a dark, vast universe where ancient civilizations, powerful factions, and beings of near-godlike proportions clash. The galaxy is torn apart by ruthless conflicts between the Imperium of Man, the Aeldari, the hordes of Chaos, and dozens of other forces, each with its own history, values, and way of war. At the heart of this endless war stand the Primarchs – the legendary sons of the Emperor who define the character of entire Space Marine Legions and whose decisions shape the fate of the Imperium across the ages.

In the world of Warhammer 40,000, the Primarchs are the most prominent heroes and anti-heroes – iconic figures who carry the philosophy of their Legions, define their visuals, tactics, and atmosphere, and act as the driving forces of narrative events from the Great Crusade to current conflicts. Whether you encounter them in novels, rulebooks, or as majestic models on the tabletop, they always feel like titanic forces pushing the entire story forward.

Their origin traces back to secret underground laboratories on Terra, where the Emperor created them as twenty perfect leaders. They were meant to be a combination of superhuman strength, genius, and charisma – natural commanders to lead humanity to unity. But before they could awaken, Chaos intervened. It scattered their incubation chambers across the galaxy, and each Primarch landed on a different world, shaped by its environment, culture, and destiny. When the Emperor embarked on the Great Crusade centuries later, he began to rediscover his lost sons – and with them, the Legions of Astartes created from their genetic samples.

The Primarchs soon became the backbone of the Imperium's expansion. They were superhumanly powerful, yet deeply human – carrying emotions, ambitions, and weaknesses that made them unique. Their triumphs were monumental and their falls devastating. It is this combination of perfection and humanity that makes them some of the most compelling characters in the entire universe.

The Great Crusade: Gold on the surface, cracks within

The Emperor's crusade was meant to unite human worlds and restore lost glory. The Astartes Legions, led by the Primarchs, conquered planets, defeated ancient threats, and spread a new order. The crusade seemed like a triumph, but tension grew among the Primarchs – their differing personalities, jealousy, and rivalry created cracks that were barely visible at first.

The Horus Heresy: The betrayal that tore the Imperium apart

These cracks eventually exploded into the Horus Heresy. Horus Lupercal, the Emperor's favorite son and Warmaster, succumbed to the manipulation of Chaos and turned against humanity. His betrayal divided the Primarchs into loyalists and traitors, and the galaxy erupted into the greatest civil war in its history. Brother fought brother, Legions destroyed each other, and the dream of a unified Imperium collapsed the moment Horus and the Emperor clashed in their final duel.

The Heresy ended, but the scars remained – and ever since, Warhammer 40,000 has been a world where war never ends.

Overview of the Primarchs

The Primarchs consist of twenty legendary sons of the Emperor, each of whom imprinted their nature, philosophy, and genetic signature onto their Adeptus Astartes Legion. Their stances during the Horus Heresy divided them into three main groups.

Loyalist Primarchs

Those who remained loyal to the Emperor and fought to save the Imperium.

Roboute Guilliman – Ultramarines
A brilliant strategist, legislator, and architect of the post-war Imperium. Currently reawakened, he leads the Imperium.

Lion El’Jonson – Dark Angels
A knightly, reserved, and deadly disciplined leader. After millennia, he has returned to active duty.

Rogal Dorn – Imperial Fists
The unbreakable master of defense and fortresses, a true symbol of Imperial resilience.

Jaghatai Khan – White Scars
A lightning-fast warrior inspired by nomadic traditions, whose fate after the Heresy remains unclear.

Sanguinius – Blood Angels
A charismatic angel with a tragic fate. He fell in the greatest battle of the Heresy while clashing with Horus.

Ferrus Manus – Iron Hands
Hard, uncompromising, and obsessed with perfecting the flesh with machines. He perished as one of the first.

Vulkan – Salamanders
Human, compassionate, and incredibly resilient – a Perpetual who always returns.

Corvus Corax – Raven Guard
A master of guerrilla warfare. After the Heresy, he vanished into the depths of the Warp.

Fallen Primarchs

Those who turned to Chaos during the Heresy.

Horus Lupercal – Luna Wolves / Sons of Horus
The Emperor's favorite son and Warmaster, whose fall triggered the entire Heresy.

Lorgar – Word Bearers
The first to fall to Chaos. His fanatical faith spread the cult of the gods across the galaxy.

Fulgrim – Emperor’s Children
A seeker of perfection and an artist who succumbed to Slaanesh. Transformed into a Daemon Prince.

Perturabo – Iron Warriors
A master of siege warfare, sensitive to slights. His bitterness led him to the dark gods.

Mortarion – Death Guard
Destroyed by his own past, he eventually fell into the hands of Nurgle and became a Daemon Prince.

Magnus the Red – Thousand Sons
A brilliant psyker who wanted to save the Imperium, but chaotic manipulation drove him to his fall.

Angron – World Eaters
Embodied rage and suffering. His past as a gladiator cast him straight into the arms of Khorne.

Konrad Curze – Night Lords
A dark visionary and psychopathic "righteous executioner," obsessed with fear and punishment.

Missing and Mysterious

Leman Russ – Space Wolves
Vanished several centuries after the Heresy.

Alpharius / Omegon – Alpha Legion
Twins, masters of manipulation and disinformation. Their true loyalty remains unclear to this day.

Primarch XI and Primarch II – Erased / Sealed
Two Primarchs about whom almost nothing is known. Their Legions were erased from Imperial records – the reasons and their fates remain a mystery.

author Karel Krajča