Swords of Praesium
Swords of Khargoth
When Chaos forces attacked the Imperium world of Acropolis Vega, two Companies from the Swords of Praesium launched a counter-attack. Not long after they made planetfall, however, a Warpstorm engulfed the system; this cut Acropolis Vega off from the Imperium for nearly 70 years. Isolated and almost certainly overwhelmed by their opposition, several squads from the two Companies swore their loyalty to Chaos in return for their survival. When the Warpstorm finally abated, those squads had formed the Chaos Space Marine Warband known as the Swords of Khargoth and led the attack upon the Imperial reclamation fleet sent to Acropolis Vega.