The Worldeaters were the 12th Chapter founded by the Emperor.
Their original armour was blue with white trim but has become the
blood red colour of their patron god Khorne. Angron is their Primarch.
The Worldeaters were created in the First Founding of the Legions and
still regard themselves as such. It is the later foundings under the
false "Emperor of Mankind" which have turned from the true path and
become decadent and depraved. Even before the Heresy the Worldeaters
were noted for their savagery. They were censured by the Emperor for
their use of psycho-surgery on new recruits to turn them into frothing
madmen. Nonetheless the Worldeaters were invaluable terror troops in
the Great Crusade and fought at the forefront of all the greatest
campaigns. It was a simple matter for Horus to pervert the Worldeaters
bloody Legion rituals to the worship of Chaos. Under his corrupting
influence the Worldeaters quickly became devoted to Khorne the blood
god.
Once renowned for their unswerving loyalty to the Emperor, the name
of the Worldeaters became a byword for carnage and terror during the
Heresy. They always fought in the vanguard of the Traitor Legions and
their Legion records show that it was they and not the Sons of Horus
who first breached the walls of the Imperial palace. The Worldeaters
retreated from Terra only grudgingly and fought their way to the Eye
of Terror, carving a bloody swathe through anything that tried to
stand in their way.
The Worldeaters continued and strengthened their blood traditions
while in exile, tying themselves ever closer to Khorne and his
daemons. All pretence of forming balanced tactical forces fell away
as the Worldeaters armed themselves entirely with pistols and close
combat weapons chain-axes and chainswords becoming the favoured tools
of bloodshed. In battle the Worldeaters' squads charged directly into
close combat, roaring their praise of Khorne as they pounded forward.
As more and more of the Legion's officers became fully fledged
champions of Khorne or were possessed by daemons all discipline broke
down. Finally at the end of the savage Skalathrax campaign an
individual who became known as Kharn the Betrayer an exalted and
utterly insane berzerker champion of Khorne set upon his brethren
with such bloodlust that the whole Legion tore itself apart in a
great battle which lasted days and nights without end. By the time
the smoke cleared the Legion had been shattered into dozens of
warbands of crazed bezerkers, which now move relentlessly through the
Eye of Terror seeking out battle and bloodshed.
Some of these warbands are hundreds strong, others are no more than a
lone champion leading his Berzerkers on a quest for carnage. Such
warbands will join their forces with any Chaos lord who is gathering
his forces for conquests asking nothing more than to spill blood and
take skulls for their lord Khorne. However even Chaos lords must be
wary in case their own heads are added to the tally of the fallen.
Taken from Codex: Chaos v2
Even before the Heresy the World Eaters were noted for their savagery and were censured by the Emperor for their use of psycho-surgery on new recruits to turn them into frothing madmen. Nonetheless the World Eaters were invaluable troops in the Great Crusade and fought at the forefront of all of the greatest campaigns. However, their feorcity made it a simple matter for Horus to quickly pervert the World Eaters' bloody legion rituals to the worship of Chaos.
Once renowned for their unserving loyalty to the Emperor, the World Eaters became reknown for carnage and terror during the Heresy. They always fought in the vanguard of the Traitor Legions and their legion records show that it was they and not the Sons of Horus who first breached the walls of the Imperial Palace. The World Eaters retreated from Terra only grudgingly and fought their way to the Eye of Terror, carving a bloody swathe through anything that impeded them. All the evidence points to the World Eaters continuing and strengthening their blood traditions while in exile. All pretense of forming balanced, tactical forces has now fallen away and they are now armed entirely with pistols and close combat weapons, chain-axes and chainswords becoming the favoured tools of bloodshed. Taken from Codex: Chaos Space Marines v3
The Primarch of the World Eaters
Angron, Daemon Prince of Khorne
Angron was one of the super human Space Marine Primarchs created by the Emperor of mankind in an effort to battle against the tide of Chaos. From Angron's genetic material the Emperor created the World Eaters Space Marines. Angron fought innumerable campaigns alongside Horus and deeply respected his ability as a great military tactician and his sense of honour and pride as a warrior.
Angron was the first Primarch to join Horus in revolt against the Emperor, for Angron knew Horus as a brother and supported the Warmaster in demanding a new order of discipline and martial virtue as the only way to save mankind from destruction. Once the rebellion turned into full scale civil war Angron and the World Eaters were drawn into bloodier and bloodier conflicts. He realised too late that instead of saving the Imperium they were destroying it, but his pride prevented him withdrawing from the war and his good intentions became his downfall as he was drawn into the embrace of Chaos.
The World Eaters had always been the most savage and warlike Space Marines and Angron led them in the worship of Khorne, god of war and bloodshed. Though Angron's loyalty to the Imperium was once exemplary, Khorne appealed his honour and martial pride more than the Emperor ever could. As a Champion of Khorne Angron led the World Eaters through some of the greatest and bloodiest battles of the Horus Heresy, including the assault on the Imperial palace. When the Heresy failed and Horus was slain, Angron and his World Eaters battled halfway across the galaxy to reach the Eye of Terror and the Daemon world Khorne had prepared for them.
Khorne has wrought many changes in Angron during the Primarch's service. Angron is now a hulking, muscular giant with skin the colour of spilt blood. His face is bestial and fang filled, his eyes milky white without iris or pupil. Angron fights with a mighty Chaos blade of black glowing iron etched with runes of doom and destruction. His voice is like the roaring of a mighty storm and mortals quail at his approach. Taken from Renegades